Also, I suppose I can understand a personal dislike of Eddie Redmayne, but he also managed to convey a kind of innocence as Newt that the character absolutely needed. He's so lost in a world of his own around his animals and so helpless around people. That was the key to making the character work, and Redmayne did very well. He's a good actor, whether people like him or not.
Also, interesting suggestion by Steve. I could see that kind of character working as The Doctor.