Heavyweights have been in an ordinary state for a long time.
Tyson was the only bright spot in the 80's, and even he at his best wouldn't have beat Ali, Frazier, Foreman or even Norton in their prime. Since him, Holyfield was really a cruiserweight who stepped up and was a warrior, Riddick Bowe came and went, Lennox Lewis although a solid champ, was really a poor imitation of an early 70's Foreman.
Middleweight and below is where the decent fights are now.