1. Holly Holm
‘The Preacher’s Daughter’ may be past her prime. But if we’re talking about sheer boxing ability, she’s out there on her own. The former UFC women’s bantamweight champion is also a former professional kickboxer and boxer. In fact, BoxRec ranks her as the 10th-best female boxer of all-time.
Holm is the former WBC, WBA and IBF world champion. Amongst many other accolades, she’s a two-time Ring magazine Fighter of the Year. She could return to boxing and fight the unified welterweight champion, Katie Taylor. Now that would be a massive fight.