For overall popularity and peak name recognition:
Hogan, Austin, The Rock, Andre, Ultimate Warrior, Goldberg, Macho Man, Ric Flair, Rowdy Roddy Piper, Sting
Based on combined ring savvy and speaking ability:
Ric Flair, Bret Hart, Rock, Sting, Macho Man, Kurt Angle, Shawn Michaels, Ted Dibiase, Austin, Mr Perfect
Great post idea,TP!