Well I know one thing that It cant be Van Pelt, Rigsby, Cho, Lisbon, or Jane because its some one working in the FBI and Jane isnt realy "bestfriends" with any of them but he's close with them plus he cant shake hands with himself and half those people on that list are dead. I think that the writter either will have Red John be obvioulsy him but you wouldnt have thought about that person, or someone REALLY obvious...if that make sense?