Top 12 Heavyweights Of All Time

12) Wladimir Klitschko 64-5

(Notable victories: Lamon Brewster, Sam Peter, Chris Byrd, David Haye, Alexander Povetkin)
Heavyweight champion: 2000-2003 (WBO)
Heavyweight champion: 2006-2015 (IBF, IBO, WBO, WBA, RING)

The third longest serving heavyweight champion of all time, a tremendous athlete known as ‘Dr Steelhammer’ and for good reason, with a dynamite left hook and a tremendous right hand which racked up 18 defences of the lineal heavyweight title, I have Wladimir in at number 10 because despite his tremendous technical abilities, the Olympic Gold medallist never really over extended himself in search of dynamic heavyweight performance of obliterating his opponent in a ferocious manner.
he seemed to do the bare minimum to achieve victory, and his loss to Tyson Fury where he seemed unwilling to throw punches added to a tarnished image after his KO losses to Ross Purrity and Corrie Sanders as he seemed unwilling to let grit his teeth and have a fight, that does not take away from the fact he is one of the most gifted boxers technique wise and furthermore with his ability to process and think in the midst of a fight, makes him a tough fight for anybody in the history of the division. He made a gallant attempt to reclaim the title in a memorable, titanic, changing of the guard title clash with Anthony Joshua in his final showing before calling time on a decorated career.

https://youtu.be/x43HSkE9AFI?t=16m