I'm not too sure about that. Speaking just resume, there are other boxers with equal or more quality wins on their resume as Ali. For example as Mcgrain stated earlier in the thread... "ATG'S ON ALI'S RESUME Liston x2 Frazier x2 Foreman ATG'S ON LANGFORD'S RESUME Tiger Flowers (KO2 despite being partially blind) Sam McVea x4 Kid Norfolk Joe Jeanette x4 Harry Wills x2 Stanley Ketchel (Some sources have this as a draw) Jack Blackburn Joe Gans"
From the list from the top of my head. 1.Benny Leonard 2.Sugar Ray Robinson 3.Sam Langford 4.Roberto Duran 5.Willie Pep 6.Harry Greb 7.Joe Louis 8.Henry Armstrong 9.Muhammad Ali All great boxers.:bbb
For me it sugar ray robinson, only really see greb and langford and armstrong with a case to be higher