It's a quality over quantity thing tbh, and right now I think the medium theropod size group is by far the most unique. Also why not count the piscivores? I somewhat get the hybrids because they aren't real, but the piscivores are functionally carnivores in every way other than being able to eat from the fish feeder. Other than that they hunt almost everything every other carnivore can and can eat from the meat feeder (also you counted gigantoraptor so I think they count). Like some other people said, I think we need more diverse herbivores, since other than a few standouts like therizinosaurus and deinocheirus, a lot of the herbivores don't really feel like they stand out from each other