Just because your battle hasn't been done before it doesn't mean it's interesting. There are plenty of good potential battles out there that haven't been done before...this isn't even close to being one of them.
@shawnbaby: Wow, you sure seem to like spending time on something you don't like at all. If you think this battle is not interesting, just ignore it. There are plenty of battles out there. Otherwise, you're just trolling here.
To answer the OP, I'd go with Billy. He has some good h2h feats. Only h2h feat of Ben I remember is, knocking blasters off Manny's hands and fighting off a robot. Maybe there are more but I don't remember them. So, Billy has my vote.