DINOSAURS

GOD TIER
T-Rex
Velociraptor

HIGH TIER
Spinosaurus
Gigantosaurus

MID TIER
Allosaurus
Triceratops
Stegosaurus

LOW TIER
Giganotosaurus
Raptorex
Utahraptor

SHIT TIER
Everything else

DIDN'T-ACTUALLY-EVEN-EXIST TIER
Brontosaurus

T-Rexes were likely pure scavengers instead of pure hunters.  Just look at the shape of their teeth and the shape of their arms.  There's no way they could have hunted effectively.