I'd say hunter. The worgen racials are a sprint - which hunters do not have, useful for PvP in either pursuit or fleeing - crit bonus - which is the Marksman's best stat, and Marks is currently considered the best spec for PvE, and one of the best for PvP - and improved skinning - hunters are arguably the best skinners out there. (Track Beasts).
Off the top of my head, I know of, say, warriors, rogues, druids, death knights, and mages for worgen.
Skinning is "meh" for warriors, crit may be good for them as DPS, and sprint? On a warrior? Seems kind of overkill, y'know?
Death knight? See warrior, except they might have more use for sprints, and would have less use for crit.
Rogues would be a decent choice - they might be skinners and they probably wouldn't mind an extra sprint in PvP, while crit would be good for both PvP and E, but I'd still pick a hunter over a rogue for that, and make my rogue a night elf for the extra Shadowmeld "vanish".
Druids? If feral DPS, see rogues. Only I'd pick a night elf even more for them, because they have no type of vanish. And can they use Darkflight while shapeshifted? If caster... I don't think any caster needs crit. Might use Darkflight, but I'm not sure.
Mages? If a frost mage needs a sprint in PvP, they're doing it wrong :P Nor do they need skinning. I'm not sure about crit for them.
Basically, you want a character that can make the most use of all the traits combined. Hunters have no real sprint alternative, and while they do have several slows, their stuns or immobilizes are few and far between (unlike, say, a frost mage).
Hunters are probably the best skinners out there just for making use of Track Beasts.
Hunters in the current go-to spec love crit.