Hmm, that exact list can change but I would say for overall talent:
All time: Austin, Rock, Angle, Piper, Savage, Sting, Flair, Undertaker, Eddie, Foley, Hogan, HBK, Bret, Brock, Mysterio
Second tier: Randy Orton, Edge, Jericho (he fell a bit last year), Ricky Steamboat, Dusty Rhodes, Kane...