1. Ali, has potential to go 14- 0 but I'm not going to be biased so I will make him 12 wins and 2 losses. 2. Lewis - the best big man boxer of the lot, surely his size would be too much for Louis, Johnson and Dempsey etc. 11 wins, 3 losses. 3. Holmes - vastly underated and could beat everyone on his day but will suffer a few defeats along the way. 10 wins, 4 losses. 4. Vitali Klitschko - H2H remember? Most won't like this choice but your old timers ain't stopping this guy. Maybe a Holyfield or Foreman would stand a good chance. H2H beats a lot of them I reckon. 9 wins, 5 losses. After this it gets extremely difficult so here goes: 5. Louis - based on merit but you just never know how he would compete with many. The purest boxer on the list with the most fluid and compact punches. 6. Foreman - again he could lay them all out, looked a little crude at times but I bet the folk boxing him didn't think that. 7. Holyfield - no one will enjoy boxing this guy and he will claim a fair few wins in fights he would be expected to lose, and probably lose some you would expect him to win. 8. Jack Johnson - very much a questionable choice in terms of he could be a nightmare for everyone or he won't be as good as we thought. This guy for his era was something else though. 9. Sonny Liston - probably comes out on top against a lot of them. The bully of the group along with Foreman and Tyson for intimidation. 10. Joe Frazier - unrelentless and gives some of the guys there toughest fights. Heart of a Lion. His run would depend on the draw and who he faced when. 11. Mike Tyson - doesn't have the atg wins but fit and focused, a few on the list will be ko'd after boxing Mike. The mentally strong fighters will come out on top against Mike like Ali, Holyfield, maybe a prime Holmes. 12. Bowe - he will fade as the tournament wears on however when at his best he is a nightmare for everyone. 13. Wlad Klitschko - sheer size and clever boxing ability will see him a get a few wins. At times he will underperform though and take a few pastings. 14. Marciano - the thing with Rocky is I think everyone can beat him?? That statement might not be popular and I'm sure he would be higher in most lists. I would happily be proved wrong. 15. Dempsey - Surely a lot of the guys would learn how to deal with Jack? His ferocity might be too much for some of them but modern fighters would be clever boxing Jack right? Another I am maybe not appreciating how good he actually was maybe.