The funny thing is Klitschko would have a great chance at beating all the fighters on this list.I could easily put Klitschko in that list.Just because the competition of this era isn't the same as when Louis and Ali were around doesn't mean he couldn't compete with them.Heavyweights now days are bigger and stronger and that is a fact.I really doubt Marciano would have a record like that fighting guys weighing 250+lbs and having the power they poses.He only fought 11 guys over 200lbs and they were just over 200lbs.Louis fought only 18 fighters who were over 200lbs!Patterson 14.Tunney less than 5.You have to take that into consideration.You can't just write him off, if you do you aren't really thinking it through.