The obvious future Hall of Famers are John Cena, CM Punk, Randy Orton, Big Show, and Kane. Depending on the year, Mark Henry will make the HOF into the Hall of Pain. Hopefully guys like Daniel Bryan, Dean Ambrose, and Roman Reigns join them later on. Guys who won't be Hall of Famers, or at least not for a long time due to weak classes, are Dolph Ziggler, Sheamus, and Ryback.
Even though you said to not include part timers, I'm just going to add Brock Lesnar to the HOF group.