Michael Moorer would lose. He had good power and boxing ability but he was severely undersized, worse chin, and had whatever movement. He was pretty carefully matched at hw because of these setbacks. Rightfully picking Holyfield and avoiding big guys like Mercer, Lewis, Bowe, and even struggled against above average sized guys like Stewart and got ktfo by shot Foreman. Any version of AJ stops him. Long post I know, but I was a big MM fan.