With an incredibly talented and equally famous cast, I’m sure the answers to this question will be quite diverse.
For me, I’ve gotta go with Jason Mantzoukas performance as Rex. His voice matches his personality so well for me.
Saying that, it’s incredibly close and the same could be said for other characters, but Jason wins it in my book.
I agree about Jason but J.K. Simmons, Walton and Steven is so incredible as Nolan, Cecil and Mark it’s almost as if they were destined to be their voices