Chris Jericho
I love Rob Van Dam but I'd be a fool to think that he's done anything in WWE that's really been of note. Jericho has at least shown some glimmers of hope. Not to mention Jericho is a lot better on the microphone.
Workrate wise, Jericho gets the nob. I've never really been a big fan of his work though. Nevertheless, it's better than the spotty matches that RVD is accustomed to.
I've seen Jericho have good matches without the use of a gimmick match. I don't know if I can say the same for RVD. At least if we're talking WWF '85 - present.