hmm, gotta say giganotosaurus. second place goes to carno and third is deinonychus. i know you only asked for one, but who cares
Deinocheirus mirificus, because goofy looking dino is best dino.
Spinosaurus, big crocodile with a sail!
‘Brachiosaurus is a genus of sauropod dinosaur that lived in North America during the Late Jurassic, about 154–153 million years ago.’-Wikipedia. Brachiosaurus are those long neck cuties and I love them
In order:
Triceratops
Diplodocus
Stegasaurus
Brontosaurus
Iguanadon
Ankylosaur
T-Rex