1. Ali 2. Lewis 3. Louis 4. Foreman 5. Holmes 6. Tyson 7. Holyfield 8. Frazier 9. W. Klitschko 10. Liston
Louis and Bowe are getting far too much credit here, Louis was basically a cruiserweight who had problems with movers and not excatly an iron chin, would be bombed out by the big guys and Bowe was far too wide open defensively to be one of the hardest ever heavyweights to beat
Louis would knock the hell out of any heavyweight today. Too many skills, too many ferocious combinations.
People are sleeping on him, Frazier regularly fought and took on guys larger than him. Seems they are thinking the results would automatically be like Foreman I.
No order but from what I've seen: Both Klitchkos Uysk Lewis Tyson Fury Holmes Ali Foreman Louis Holyfield I could change with Louis, but Louis did hit harder and was more capable of KOing the bigger man. Although Holyfield is tougher. Almost Frazier but I think Holyfield goes slightly ahead. The reason being I think Holyfield is stronger and won't be clinched as effectively. Bowe was big skillful and powerful but never fought tall, with that I think he fought stupidly, and gets hurt alot. Marciano too small unfortunately.