I'm not so sure. You maybe forget the weight that all these guys were actually fighting at. Pre-Buster Tyson beats anyone but he was fighting at under 16 stone most of the time and was only 5'10. Ali was fighting at 212lbs on average. Usyk just weighed in at 226. I'm with
@Junglist - ATG Cruiser and a great heavyweight - arguably the best of this generation and since Lennox Lewis (who I still think is under rated). I also believe that Usyk is a great man regardless of his boxing prowess, that sets him above his current peers.