While not quite as gigantic, there's plenty of large carnivorous theropods in the game.
Allosaurus, Albertosaurus, Megalosaurus, Baryonyx, Suchomimus, Majungasaurus, Qianzhousaurus and
Cryolophosaurus.
And generally herbivores massively outnumber carnivores in most ecosystems. So it makes sense to have a similar balance in the game as well. And it's already heavily in favour of more carnivores as it is.
As to you suggestions... A lot of them are problematic in many ways
- - Deltadromeus is only known from very fragmentary remains and it's possible it's not a carnivore at all. It's also not that big. At the moment it seems likely that it's a herbivorous noasaur that might not even have any teeth. No one can agree which family this animal belongs to or what it looks like. So it shouldn't be added.
- - Mapusaurus is basically almost the same as Giganotosaurus. No need to add another dinosaur that's just almost the same one with a different name.
- - Saurophaganax is most likely just a large Allosaurus. I haven't checked the scale in JWE2, but in JWE1 Allosaurus was already sized like Saurophaganax. So no reason to add that either.
- - Oxalaia is just known from a snout tip. It's big yes. But we don't know what it looks like. And some scientists have suggested that it's just Spinosaurus. Again not the best dinosaur to add.
- - Sigilmassasaurus could be interesting. Again some scientists say it's just Spinosaurus (I disagree). It seems to be different from Spinosaurus and possibly even larger. And it might it might not have a sail. But all we have of this animal is part of the neck. So we don't know what it looks like.
- - Epantarias is a dubious genus and should not be added.
- - Tarbosaurus is the only suggestion that could be a pretty good addition. Although again, there are some scientists who say it's just another species of Tyrannosaurus. But it's probably distinct enough to add. It could be interesting
If you want more large carnivorous theropods, here are alternative suggestions.
- - Torvosaurus. Present in both N. America and Europe. Larger than Allosaurus
- - Ichthyovenator. A large spinosaurid where we actually have a bunch of the bones. It also looks wildly different from other spinosaurids we know.
- - Zhuchengtyrannus. Maybe not the best suggestion because it's closely related to T. rex. But it's still distinct and very large.
- - Daspletosaurus. Not quite as large as T. rex but still a good sized tyrannosaur.
- - Yangchuanosaurus. Good sized theropod
But we really already have most of the really large notable theropods that are worth putting in the game.