here is my top ten .

1. Muhammed Ali
2. Joe Luis
3. Lennox Lewis
4. George Foreman
5. Mike Tyson
6. Larry Holmes
7. Joe Frazier
8. Floyd Patterson
9. Sonny Liston
10. Evander Holyfield


I haven't put marciano here because the best opponents he beat where out of their prime , if you say we should put marciano in the top 10 then we should put valuev to there after another 10 wins without loosing.