I might actually give that nod to Gillislie who showed some good burst and power, despite his limited role.
I ultimately think Gillislie and Lewis are their most talented RBs. Right now White appears to be more consistent and dependable, but as has always been the case his ceiling is quite low.
I think they all have a role.
Not to open up another can of worms, but if I was going to trade a player I might look closely at Gronk. Again, I'm not saying I would, but I'd entertain the idea given Gronk's injury issues and the what he could possibly net in return.