#1 Conor McGregor
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By far the richest UFC and Mixed Martial Arts fighter of all time, Conor McGregor is the biggest sensation in fight sports in recent times.
Although he lost his last outing against Floyd 'Money' Mayweather, the loss came in boxing, so it is something that the fans are willing to overlook.
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McGregor is set to fight Khabib Nurmagomedov upon his return to the company at the next UFC pay-per-view, UFC 229.
McGregor is one of the top talents to be in the UFC and was even a Two-Division Champion, having won both the Featherweight and the Lightweight Title. He has lost only 3 of his 24 professional matches, and he will be looking to make his 25th professional fight a huge win against Khabib.