Hear is my opinion of the 10 best heavyweights to ever fight in boxing. Modern boxing begain in 1892 and continues to the present.
1. Muhammed Ali (6'3 210lbs.): This guy could do it all. His most impressive accomplishments came long after his prime had ended. He was not immortal, nobody is, but he was the best of all time. He had the style to win any kind of fight.
2. Joe Louis (6'1.5 200lbs.): at 200lbs he might seem a little small by todays standards but size, while a factor, is grotesquly overrated. In the heavyweight division size is only an advantage to a point, then it becomes a detriment. Louis was an excellent technician and had brutal power with amazingly quick hands. I'd take Ali to beat him but if anybody could upset "The Greatest" it's him.
3. George Foreman (6'3.5 225lbs.): Probably the most physically impressive fighter ever. This guy was just a beast. He absolutely destroyed some great fighters. In his first career he just didn't have the maturity and confidence to get it done. Very few people rank him this high but I believe that while his accomplishments are that great (relatively speaking) that at his peak he really was that good of a fighter.
4. Mike Tyson (5'11 218lbs.): In his prime he was something to behold, sort of a hybrid of Joe Louis and Joe Frazier. He destroyed very big, very strong fighters before he began his rather rapid collapse. He probably could have been the greatest heavyweight ever but like Foreman, mental issues prevented him from achieving his full potential.
5. Evander Holyfield (6'2 215lbs): If he and Mike had met in their respective primes I don't think Holyfield would have won, but he might have. A great fighter who almost undoubtably used steroids to muscle up. Not overwhelmingly powerful but tough and with no glaring weaknesses.
I'll post 6-10 later, don't feel like it now