His most notable wins were against an old Larry Holmes and a glorified light-heavyweight in Michael Spinks.
Tyson was the most fun fighter to watch in his prime, IMO, but not the best. He lost to Buster Douglas when he was still a young boxer. Gotta go with Ali and even Frazier as being better heavyweights, and Wlad Klitschko would have destroyed Tyson at any point of Mike's career, just because of his size and skill as a boxer. Mike would have been so frustrated, he would have eaten both of Wlad's ears had Mike been able to reach that high.