Originally Posted by Cojimar 1945
Marciano was more dominant against his contemporaries than Ali was but he did not fight against top contenders for as long as Ali did. Johnson on the other hand did not face his best challengers so comparing him with Ali is difficult given that Ali did not duck the best.
What you say about Marciano and Johnson is why I rate them third and fourth and not first. Don't forget, though, that Johnson did defeat the black dynamite fighters before he won the white championship and Ali did not rematch Foreman, who was clearly the #1 contender between 1975 and 1977, and also probably avoided the rising Holmes.