I believe that Red John is someone else not on the list.  Red John has gone to great lengths to remain anonymous.  Even if he was on the list why would he tell Jane?  Why would he even mention a list.  Why not try to direct Jane away from the list.  I believe the people on the list are all disciples of Red John who have killed for him.  You heard Partridge refer to Red John Proxies.  Red John also said he cannot tolerate cheap imitations of his work.  I am guessing he can tolerate imitations of his work that he commisioned by a small group of trusted associates.

Just imagine if Red John was Kirkland, Partridge or Stiles.  Does Heller really want that to be his legacy?  A predictable ending to the Red John story.  Or someone like the Sherrif or Reede Smith.  An ending just structured around a character that we know nothing about.  That would not be creative.  I am guessing Heller will lead us to believe up until th last minute that Red John is one of the men on the list and then spring it on us that the true Red John is someone who was orchestrating the actions of an adequate Red John Proxy.  So in a way Heller would have been telling the truth about the list.

Doesnt Heller want people to be surprised and say "I never saw that ending coming"  He is an artist.  I would guess he would want to be remembered for his creativity not his predicability.  So my choices using creativity and unpredictability as my parameters are the following suspects 3 suspects.  I think any one these 3 being Red John would make people say Holy Shit, I never saw this coming:

Wayne Rigsby
Kimball Cho
or a real twist with a faked death of Craig O'Laughlin

These are just my 3 choices.  I think the identity of the real Red John will stun mostly all of us.