Tyson Fury
Few people would disagree that Fury is the most talented heavyweight of his generation. He also has an inspirational story because he rebounded from depression. ‘The Gypsy King’ ballooned up to over 350 lbs. as he suffered from substance abuse. But he turned his life around and reclaimed the heavyweight title in style (via The Times).

But Fury is a polarizing figure because he behaved badly outside of the ring. He also maintains a friendship with one of the worst gangsters of the modern era; Daniel Kinahan. Irish courts named him as one of the most notorious drug lords on the continent. Fury refuses to denounce his friend and claims the Irish government has an agenda against him.