Love him or hate him, Conor McGregor is one of the biggest names to ever set foot in the Octagon. All the intense trash-talking and brash behavior made him a must-watch personality for fans and haters alike before he retired in 2020 (and eventually came out of it). He created a personal brand so intriguing that it boosted him to become the highest-paid UFC fighter throughout its history.
Nicknamed "The Notorious One" due to his antics, his polarizing behavior served him and the UFC well for PPV buy rates, landing five of the six most buys in UFC PPV history.
After winning the UFC Lightweight Championship at UFC 205, Conor McGregor become the first fighter to hold two titles in different divisions at the same time.
Even outside his expertise in MMA, McGregor brings in the cash. In his first, and only, boxing match against Floyd Mayweather, in which he suffered a TKO in the 10th round, the duo garnered 4.3 million PPV buys; the second most in boxing history.