Either a Deinosuchus or a T-rex.

A large sauropod of some kind

A Spinosauridae

Carnotaurus.

Fuck dinosaurs, Quetzalcoatlus northropi is where it's at. Oh, you want proof? Here you go:

1. Pole-vaulting into the sky like a giant vampire bat

2. Eating whatever fits in your mouth, and maybe some things that don't (they must have had strong neck verts for a reason ...)

3. Taller than a fucking Tyrannosaurus rex

4. Make yourself look bigger by rearing up and spreading your wings

5. Become the real life Grim Reaper

Tyrannosaurus, giganotosaurus, dreadnoughtus, nuff said.

Hatzegopteryx, T-Rex, Spino, Argentinasaurus, Ankylosaurus, and anything else that was almost unstoppable.

Tyrannosaurus is my favorite, but id have to go with the spinosaurus

Or quetz

Probably either a Spinosaurus, Dreadnoughtus, Quetzalcoatlus, or Tyrannosaurus