I strongly disagree, nobody in the division has a resume so deep.
Liston, Frazier, Foreman, Norton, Holmes, Shavers, Patterson, Moore, etc.....
That certainly trumps Louis who had Carnera, Schmeling, Baer, Braddock, Charles, Walcott, Marciano, etc....
And also tops Johnson who had Jeffries, Willard, Ketchel, Fitzsimmons, Langford, McVey, etc....
The fighters that run Ali the closest resume wise are probably Lewis and Holyfield IMO.