CM Punk, Randy Orton, Big Show, Mark Henry, Kane, Christian, Rey Mysterio, Chris Jericho, etc.
The others depend on how long they stick around. It seems just about anyone who is relevant for at least 3-5 years in the midcard is guaranteed a spot in the hall of fame, if they also maintain a good relationship with the company as well. That means guys like Sheamus and The Miz and Dolph Ziggler and Kofi Kingston and R-Truth (who had his first stint in the company as far back as 2000/2001) will probably end up with guaranteed spots as well.