#4. Conor McGregor (UFC lightweight)
Conor McGregor's only professional fight in the squared circle was against one of the best boxers in history, Floyd Mayweather Jr.
Though Mayweather won the fight, McGregor showed flashes of excellent boxing skills against a man no one thought the Irishman could even hurt.
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When looking at his UFC record, one thing becomes crystal clear - Conor McGregor is an elite boxer. His counter-left hook is one of the most feared punches in MMA.
The Irishman has knocked out fighters such as Eddie Alvarez, Chad Mendes and, most famously, Jose Aldo in 13 seconds to win the Brazilian's featherweight belt.
#3. Jorge Masvidal (UFC welterweight)
A fighter with great hands and a good understanding of boxing, Jorge 'Gamebred' Masvidal is an elite striker.
Masvidal is great at multiple aspects of boxing, including punching technique, power, movement and defense.
Masvidal has only had one professional fight as a boxer, which he won. Although an elite mixed martial artist, many would love to see 'Gamebred' in the squared circle.