The single coil sized humbuckers are mostly designed to be used with 250k pots, hot rails, cool rails, little '59 etc.
I've also seen people on here recommend JBs and Pearly Gates for full size humbuckers with 250ks. I think mine have been with 250K pots when I've used them in a HSS strat style guitar and I never had any issue with those two.
There may be some more, but I believe most people seem to prefer 500K pots for other full size humbuckers.