I really don't need to go into the whole Barret thing, he's the best and everyone knows it. That is why I chose Justin Gabriel, #2 on this list in my opinion. It's been said a thousand times before, he has the in-ring work but not the mic skills, but I still see him going places. In fact one of the main reasons I choose him is because he shares a lot of qualities with a one Jeff Hardy. Jeff was (and still is) shit on the mic, but look at him now, he's a former 2x World Champion. Gabriel was pretty over with the crowd on NXT, he has the high-flying moves that please the crowd, and he's got a decent enough look. If they can push him right, I can honestly see him as a Mid-Card or even World Champion in the future.
As for the other guys, I still think there is hope. Contrary to what everyone thinks, I actually like Heath Slater, although he has a shitty gimmic at the moment. In FCW, when he was putting on matches with Justin Gabriel (Angel at the time) they would be really good, and I would actually like to see him week after week. The same goes for Michel Tarver, his got an intense and interesting persona that I can see lead him to a Mid-Card championship or even World title in the future, just needs some tweaking. Sheffield has the look that Vince likes and he's decent in the ring, might have a successful career as a Batista-esque character. Darren Young...get him back with Percy Watson, and fast. Otherwise, I don't see much of a future for the guy, even if he is the Black John Cena. Tag titles is about as far as I see him going. And Otunga...decent on the mic and shit in the ring, not much more to say.