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Please be sure to read the description before commenting.

Nowadays, size comparisons featuring a number of giant and famous predatory dinosaurs are very popular in the dinosaur DeviantArt community, among the most popular of which is Franoys' giant predatory dinosaur comparison (even though I disagree with every single estimate, there's no denying how popular it is among those who do agree with it).

However, in these types of comparisons, the most popular of the theropods tend to 'hog' the spotlight from less well known but just as large taxa (such as the ones featured here) that are every bit as large as, if not significantly larger than, the aforementioned spotlight-hogging taxa, such as T. rex.

And as such, I present to you a size chart of 8 rather obscure but very good sized predatory dinosaurs that are every bit as deserving of the spotlight as the more famous species if not moreso. You have likely seen or heard of at least some of these species from some of my other deviations and/or journals, but here they are all together.

Clockwise from top left, the species in the chart are as follows.

Giant Tendaguru megalosauroid (Torvosaurus spp?) - Uncatalogued

Surprisingly even bigger than the previously used giant megaosauroid discussed in one of my other journals , this is one of Tendaguru's largest theropods and may be a more familiar form than you think.
A large megalosauroid astragalus is known from the Tendaguru as per this blogpost , and is 21.2 cm wide according to the Theropod Database. It is based on Greg Paul's Torvosaurus/ composite megalosaurid skeletal, and given the astragalus' measurement the tibia ended up at 118.3 cm long, much bigger than even the 110 cm estimate for the previously featured tibia. The skeletal that was used here as a base for it yields lengths of over 13 meters and a mass of over 7000 kg.
Note that because we may have Tendaguru Torvosaurus remains, this may belong to that taxon, although that is not certain at this time.

Tratayenia rosalesi - MCF-PVPH 418

Discussed in one of my other journals , this is very likely the biggest megaraptoran specimen we have so far, at an estimated 13.6 meters long and 8900 kg. I am not surprised of this specimen's obscurity considering that not a lot has been found and not a lot has been very extensively figured, but I do think it deserves more recognition.
Note, however, that the arms were almost certainly a lot bigger than shown in the megaraptoran composite skeletal used here.

Bahariasaurus ingens - IPHG 1912 VIII 62c

Restored as a non-megaraptoran basal tyrannosauroid (Yutyrannus and Sinotyrannus), this animal ends up at 13.5+ meters and 8000+ kg sized up to the 22.5 cm measurement for the posterior dorsals given by Mickey Mortimer .
Note that this may also be an allosauroid, megalosauroid, megaraptoran tyrannosauroid, or ceratosaur, but would still be very big.

Sauroniops pachytholus - MPM 2594

A very little known carcharodontosaurid that is quite possibly among the largest known theropods of all.
The frontal is at least as large as that of SGM-DIN 1 (meaning that Sauroniops was likely somewhere in the 13-13.7 meter and 9000-9800 kg range going by my estimations for SGM-DIN 1 ), but to minimize extrapolating from an extrapolation in and of itself, Giganotosaurus was used as a base. Here, this is a 13.3 meter animal about 9300 kg.

Unnamed giant Tendaguru carcharodontosaurid

Following the blogpost linked above, there is a rather large fibula from the Tendaguru of a seemingly unnamed species of carcharodontosaurid, and it is 91 centimeters long.
This is suggestive of an animal approaching the size of some of the later Cretaceous carcharodontosaurids (famous for their giant size). I had chosen Acrocanthosaurus as a base because it is one of the most complete of the basal carcharodontosaurids, and using it as a base for this giant fibula, the owner of the bone ends up around 12.8 meters long and over 8000 kg.

Mystery Bahariya theropod fibula - IPHG 1912 VIII 70

One of Stromer's destroyed discoveries, this is a large theropod fibula 115 cm long, which could belong to Deltadromeus, Bahariasaurus, or an unnamed species of allosauroid, ceratosaurid, or megalosauroid.
It is tentatively restored as a ceratosaur here based on Ceratosaurus, which yields a length of over 13 meters and a mass of over 6000 kg.

Deltadromeus agilis - lost giant femur

This one comes out quite a bit larger than most think. Our largest specimen, mentioned in Ibrahim et al. 2020, is a lost giant femur 1.22 meters long.
Quite larger than the 74 cm femur of SGM-DIN 2, this specimen ends up 13.2 meters long based on Sereno's estimate of 8 meters for the former, and can be estimated at 6000 kg based on isometric scaling from the probable close relative Guanlong (see discussion in comments).
Note, however, that here I have chosen to go the route of Deltadromeus being a basal tyrannosauroid, which the original skeletal from Sereno depicts. It's also possible it could be a ceratosaur, as per PWNZ3R-Dragon's skeletal .

Unnamed giant São Paulo abelisaurid - URC R 44

This animal is probably our best evidence for giant abelisaurids at the moment. Its skull is estimated at 120 cm long , and assuming similar proportions to an abelisaurid composite of Abelisaurus/Aucasaurus, it's about 12.2 meters long. Mass is probably in the region of 7500-8000 kg.

NOTE: I do not own any of the skeletals used here. As the image says, all credit goes to Greg Paul for the Ceratosaurus/mystery fibula and composite megalosaurid/Torvosaurus, SpinoInWonderland for the Sauroniops/Giganotosaurus, Paul Sereno for the Deltadromeus, GetAwayTrike for the unnamed carcharodontosaurid/Acrocanthosaurus, Tratayenia/megaraptoran composite, and abelisaurid composite, and Daniel Barrera for the Sinotyrannus/Yutyrannus/Bahariasaurus.
All unspecified masses are also based on volumetric models from Greg Paul and SpinoInWonderland.

EDIT: Thanks to some pointers from meekororum, the "Ceratosaurus" roechlingi was overhauled and replaced with the mystery fibula.

EDIT 02/16/2021: Revised some size estimates.

Description
Please be sure to read the description before commenting.

Nowadays, size comparisons featuring a number of giant and famous predatory dinosaurs are very popular in the dinosaur DeviantArt community, among the most popular of which is Franoys' giant predatory dinosaur comparison (even though I disagree with every single estimate, there's no denying how popular it is among those who do agree with it).

However, in these types of comparisons, the most popular of the theropods tend to 'hog' the spotlight from less well known but just as large taxa (such as the ones featured here) that are every bit as large as, if not significantly larger than, the aforementioned spotlight-hogging taxa, such as T. rex.

And as such, I present to you a size chart of 8 rather obscure but very good sized predatory dinosaurs that are every bit as deserving of the spotlight as the more famous species if not moreso. You have likely seen or heard of at least some of these species from some of my other deviations and/or journals, but here they are all together.

Clockwise from top left, the species in the chart are as follows.

Giant Tendaguru megalosauroid (Torvosaurus spp?) - Uncatalogued

Surprisingly even bigger than the previously used giant megaosauroid discussed in one of my other journals , this is one of Tendaguru's largest theropods and may be a more familiar form than you think.
A large megalosauroid astragalus is known from the Tendaguru as per this blogpost , and is 21.2 cm wide according to the Theropod Database. It is based on Greg Paul's Torvosaurus/ composite megalosaurid skeletal, and given the astragalus' measurement the tibia ended up at 118.3 cm long, much bigger than even the 110 cm estimate for the previously featured tibia. The skeletal that was used here as a base for it yields lengths of over 13 meters and a mass of over 7000 kg.
Note that because we may have Tendaguru Torvosaurus remains, this may belong to that taxon, although that is not certain at this time.

Tratayenia rosalesi - MCF-PVPH 418

Discussed in one of my other journals , this is very likely the biggest megaraptoran specimen we have so far, at an estimated 13.6 meters long and 8900 kg. I am not surprised of this specimen's obscurity considering that not a lot has been found and not a lot has been very extensively figured, but I do think it deserves more recognition.
Note, however, that the arms were almost certainly a lot bigger than shown in the megaraptoran composite skeletal used here.

Bahariasaurus ingens - IPHG 1912 VIII 62c

Restored as a non-megaraptoran basal tyrannosauroid (Yutyrannus and Sinotyrannus), this animal ends up at 13.5+ meters and 8000+ kg sized up to the 22.5 cm measurement for the posterior dorsals given by Mickey Mortimer .
Note that this may also be an allosauroid, megalosauroid, megaraptoran tyrannosauroid, or ceratosaur, but would still be very big.

Sauroniops pachytholus - MPM 2594

A very little known carcharodontosaurid that is quite possibly among the largest known theropods of all.
The frontal is at least as large as that of SGM-DIN 1 (meaning that Sauroniops was likely somewhere in the 13-13.7 meter and 9000-9800 kg range going by my estimations for SGM-DIN 1 ), but to minimize extrapolating from an extrapolation in and of itself, Giganotosaurus was used as a base. Here, this is a 13.3 meter animal about 9300 kg.

Unnamed giant Tendaguru carcharodontosaurid

Following the blogpost linked above, there is a rather large fibula from the Tendaguru of a seemingly unnamed species of carcharodontosaurid, and it is 91 centimeters long.
This is suggestive of an animal approaching the size of some of the later Cretaceous carcharodontosaurids (famous for their giant size). I had chosen Acrocanthosaurus as a base because it is one of the most complete of the basal carcharodontosaurids, and using it as a base for this giant fibula, the owner of the bone ends up around 12.8 meters long and over 8000 kg.

Mystery Bahariya theropod fibula - IPHG 1912 VIII 70

One of Stromer's destroyed discoveries, this is a large theropod fibula 115 cm long, which could belong to Deltadromeus, Bahariasaurus, or an unnamed species of allosauroid, ceratosaurid, or megalosauroid.
It is tentatively restored as a ceratosaur here based on Ceratosaurus, which yields a length of over 13 meters and a mass of over 6000 kg.

Deltadromeus agilis - lost giant femur

This one comes out quite a bit larger than most think. Our largest specimen, mentioned in Ibrahim et al. 2020, is a lost giant femur 1.22 meters long.
Quite larger than the 74 cm femur of SGM-DIN 2, this specimen ends up 13.2 meters long based on Sereno's estimate of 8 meters for the former, and can be estimated at 6000 kg based on isometric scaling from the probable close relative Guanlong (see discussion in comments).
Note, however, that here I have chosen to go the route of Deltadromeus being a basal tyrannosauroid, which the original skeletal from Sereno depicts. It's also possible it could be a ceratosaur, as per PWNZ3R-Dragon's skeletal .

Unnamed giant São Paulo abelisaurid - URC R 44

This animal is probably our best evidence for giant abelisaurids at the moment. Its skull is estimated at 120 cm long , and assuming similar proportions to an abelisaurid composite of Abelisaurus/Aucasaurus, it's about 12.2 meters long. Mass is probably in the region of 7500-8000 kg.

NOTE: I do not own any of the skeletals used here. As the image says, all credit goes to Greg Paul for the Ceratosaurus/mystery fibula and composite megalosaurid/Torvosaurus, SpinoInWonderland for the Sauroniops/Giganotosaurus, Paul Sereno for the Deltadromeus, GetAwayTrike for the unnamed carcharodontosaurid/Acrocanthosaurus, Tratayenia/megaraptoran composite, and abelisaurid composite, and Daniel Barrera for the Sinotyrannus/Yutyrannus/Bahariasaurus.
All unspecified masses are also based on volumetric models from Greg Paul and SpinoInWonderland.

EDIT: Thanks to some pointers from meekororum, the "Ceratosaurus" roechlingi was overhauled and replaced with the mystery fibula.

EDIT 02/16/2021: Revised some size estimates.