Joe Louis is ATG heavyweight with his record number of defenses, consistency and what he did as a champion. He did not weigh over 200lb at his peak because he was superstitious but could hit very hard.

Wilder is not that much heavier than Louis but AJ, Lewis and Fury’s of this world are considerably heavier and would use it to their advantage.

Conversely if Joe Louis was born in this era he would be bigger so would have smashed them all.