The only reason that I'm only picking herbivores for this poll is to break the trope that herbivores are weak defenseless animals that are just carnivore fodder.

Udanoceratops or bust

Imagine getting an Udanoceratops fight the people, and maybe rip someone’s arm off

Maybe a scene where it literally bites off an Anzu's leg.

That sounds cool. Plus, make it chase it after the people for a scene after it ripped of the Anzus’ legs