#2. Colby Covington - UFC welterweight
Whilst Leon Edwards is the next number one contender at welterweight, it is hard to argue that there is a better fighter than Colby Covington in the entire division outside of champion Kamaru Usman.
Covington has been competing at the very top of the weight class for some time now, even claiming the interim title at one point. Edwards has a similarly impressive record, but has not competed at the top of the division for quite as long as Covington. Should 'Rocky' defeat Usman this summer, this will of course significantly alter this list.
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However, for the time being, Colby Covington's dominant wins over Jorge Masvidal, Tyron Woodley, Demian Maia, Robbie Lawler and Rafael dos Anjos have him solidly placed as the number two of the division.
#1. Max Holloway - UFC featherweight
The gap between Max Holloway and the current featherweight champion Alexander Volkanovski is so narrow that it would be easy to argue that 'Blessed' is the superior fighter.
However, Holloway has lost twice to Volkanovski, regardless of how controversial the judges' decision was in the second bout.
It does seem inevitable that the two elite 145lbers will compete at least once more, although it's anyone's guess if the result will shed any more light on who is the best fighter at 145 pounds.