Alright, I'll bite. So, in no particular order, my top 10.
-Eddie Guerrero: Great in the ring, fine mic skills (would be better without riduculous accent), charisma, fan support, what more could you ask for?
-Edge: As long as he stays injury free, he's going straight to the top. I don't think that he should be heel though. The only heel he can, forseeably, pull off is comedy heel, and that's a big no-no.
-Chris Jericho: Fans either love him or hate him, but they're not indifferent, which is the important thing. He's been carrying Raw on his back (well, at least wrestling wise) for the past year or so. He's got mic skills, and wrestling skills.
-Sheldon Benjamin: Has had a great first year in WWE. He and Charlie are really coming out as their own. He's young, talented, and not too bad on the mic for someone who has barely been on the mic.
-Charlie Haas: Isn't as good as Sheldon, IMO, but still great. Mic skills needs a little work (not too big of a deal though).
-Matt Hardy: Laugh all you want, but I still maintain Matt is going to be HUGE. He's still very young (29ish, I believe), and has improved so much since breaking away from Jeff. Mark my words: he'll be WWE Champ one day.
-Brock Lesner: I'm not a huge fan of Brock's, but he's still very useful in building up a company.
-Rob Van Dam: Not the greatest wrestler or anything, but he's so damnn over. I still can't fathom why WWE didn't push him to the moon, but whatever.
-Chris Benoit: Even if he's getting up there in age, he's still a great wrestler. He makes an awesome intense heel or face, and despite what many say on this board, I think his mic skills are fine. Not his greatest skill, but still fine nevertheless.
-Rey Mysterio: This guy is a godsend for the cruiser division if they use him right (which they're starting to, surprisingly). He could be what they build the division on, and hopefully, it could be as good as it was in WCW.
Honorable Mentions: Cena, Spanky, Trish.
EDIT: Not sure why I didn't mention Angle, but if he doesn't injure himself, he's up there too.