What's your list? Active 1. Wlad 2. Povetkin 3. Wilder 4. Fury 5. Jennings 6. Pulev 7. Takam 8. Stiverne 9. Chagaev 10 Glaskov 11. Thompson 12. Chisora 13. Cunningham 14. Tarver 15. Perez One of the few times I don't have many problems with Ring's rankings. Also, there are a few fighters (Joshua, Parker, Wach, who could probably beat many of the fighter above, but this is h2h resume blend, and they don't have the resume yet) All time 1. Ali 2. Louis 3. Marciano 4. Lewis 5. Dempsey 6. JL Sullivan (yeah, he'd get killed h2h, but he started the sport for all intents) 7. Holmes 8 tie Wlad and Vitali (Vitali's underrated on legacy, his wins over Sanders and Peter are more impressive to me than Wlad's best wins, I'll move Wlad above both his brother and Holmes if he beats Fury and either Wilder or Povetkin to unify) 10 Foreman 11 Jack Johnson 12 Mike Tyson 13. Joe Frazier 14 Gene Tunney 15 James Jeffries Except for Frazier, they are all either the best or second best of their era. Generally not fair to place 3rd or 4th best fighters of an era above clear 1 and 2's, "quality" of opponent argument for that is too subjective.