#4 Jon Jones
Jon Jones might be a controversial and polarizing figure but inside the octagon, he is a force to reckon with. He won his first UFC championship at the age of 23 by defeating Mauricio Rua at UFC 128. It was a dominating win for Jones and it started his long run as the UFC Light Heavyweight champion.
He successfully defended the title against names like Lyoto Machida, Quinton Jackson, Rashad Evans, Vitor Belfort and Chael Sonnen among others. He also had a memorable showdown with Alexander Gustafsson during this run. Four years and eight successful title defences later, Jones was stripped of the title after he violated UFC’s Athlete code of conduct policy.
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Technically speaking, Jones never lost the title in the first place. After dealing with multiple issues in his personal life, Jones came back strong to reclaim the championship and it would be interesting to see whether or not he will be able to beat his previous run as champion.