19. Francis Ngannou
Ngannou has an incredible story after he migrated to France as an illegal immigrant. Then he became one of the top UFC fighters on the planet. The Cameroonian possesses amazing punching power and knocks his opponents into oblivion. In 2021, he became the UFC heavyweight champion.
Then Ngannou threatened to leave the UFC hanging by refusing to fight unless they paid him his worth. Some people thought that he was greedy but others pointed at the prize money in boxing. It’s a sticky situation and Ngannou won’t back down (via TalkSport).