Chester Cheetah is a fictional character and the official mascot for Frito-Lay's Cheetos brand snacks as well as Chester's Snacks which consists of flavored fries, popcorn and puffcorn.[1]
Obviously, don't nominate any human characters. Hybrids like Cheetah or The Lizard are okay, as are shapeshifters with one set animal form (eg Professor McGonagall.)