If had to pick the best fighter of the past 20 years I have to say with out a doubt it is Lennox Lewis. I think he is a top ten heavyweight in upper part of the list. I don't think he ever really lost in his prime. Another big thing to me is also when you are the top heavy it means you can beat anyone. I am not taking about pound for pound i talking about literally you can beat everyone who is boxing at that time in the ring.