Edit: Heavyweight ofcourse. 1.Lennox Lewis 2.-----(number 3 spot has tie so no number 2) 3.tie between Vitali and Ali (Also known as Ali "Alkali" because of his high energy in the ring) 4.Wlad 5.George foreman 6.Larry Holmes 7.Mike Tyson 8.Eric "marvelous" Esch 9.Jimmy Young 10.Holyfield Deep inside our heart we all know this is the true powerranking. I excluded Joe Louis because he fought more than half his fights as a cruiserweight, I don't think he would have made the top 10 anyway. 37 fights as cruiserweight. 16 fights max 5 pounds away from cruiserweight level. (And from those 16 most were in the 2-3 pounds too heavy range)