Conor McGregor. Despite not competing since 2021, he’s still more than likely one of the biggest stars in MMA and the UFC today. Without a doubt, the biggest star that we’ve ever had in the business’s history, he’s the holder of eight of the highest-grossing PPVs in UFC history.
He became famous for his attitude alongside his ability. He came up in the game by accepting all comers, including a short-notice interim title fight against Chad Mendes when Jose Aldo pulled out of their scheduled fight.
This was, however, whilst he was on the rise, undefeated in the UFC and full of confidence.