What a neat and thought provoking question! Just off the top of my head, of course Walt and Roy. I’d also definitely have to include Marc Davis, Ub Iwerks, Claude Coats, Bob Gurr, and from modern times Joe Rohde. That’s way too many already probably, and that’s just off the top of my head! I’m sure there’s many more if I think about it. I kept it actual people and not cartoon or created characters. Then it would probably number in the dozens or hundreds!