8. The Klitschkos
It’s fair to say that these two men are boxing’s most terrifying brothers. Wladimir and Vitaly are legendary figures in modern boxing. After the retirement of Lennox Lewis, they emerged to become the best heavyweight boxers of their era. They held every heavyweight title for over 10 years. These two hulking men were brilliant.

Nobody ever managed to knock down Vitaly. However, Wladimir was arguably the better boxer. He’d become the unified champion when his brother retired and held the WBA, WBO, IBO, IBF, Ring Magazine and lineal titles. You can’t be more undisputed than that.