Errol Spence until proven otherwise. Has the best resume at the weight, Boots still has training wheels on, Vergil is done, Crawford hasn't got an elite win in his career.
I think Boots "will be" (and I've said this numerous times). But until he's dethroned or moves up Spence is
Crawford for me, with Spence 2nd and then there's a drop off, they are both levels above anyone else at 147.