Any of those are very flawed and any of them could beat or lose to one another at any given night. I would probably go with Huck by a hair, i know he sometimes looks like a caveman in there and that his win over Lebedev was controversial still hes the most proven guy at the weight and recently tied or broke(cant remember which one it was) Nelson's record for title defenses at that weight.
This. Plus, each Huck and YPH, his biggest competition, have had a controversial outcome. Huck has just done it over and over for a long time and against good competition from time to time.