If we are to be realistic - I think only 4 tyrannosauroids will make it into the base game - those are T.rex, Albertosaurus, Qianzhousaurus, & Proceratosaurus.
Still I think we could likely see another Tyrannosaur or two in various DLCs for the game.
Yes - I agree that Dryptosaurus & Alectrosaurus are only known from very fragmentary remains, and likely won't be included at all.
However Appalachiosaurus is the most complete Appalachian tyrannosaur and one of the most complete Appalachian dinosaurs ever found - so if an Appalachian tyrannosaur were to make it into the game - it would most likely be Appalachiosaurus. Still the Appalachiosaurus holotype specimen is only known from about 30-40% of the skull, & jaws, most of the legs, part of the pelvis, and about 5 tail vertebra. And it is believed to have been a sub-adult specimen about 7 meters long. So a full grown adult would likely have been about 9-10 meters long.