First of all, I find it hard to believe that this "Tyger-Tyger" business has been going on under the noses of Jane, Lisbon, Cho and Rigsby without one of them noticing. And I agree with the recent comment on this board that at least one of them would have been invited to join-up (probably Cho: "The Iceman").
VanPelt has a secret. I suspect that she in involved with the Visualise cult. Remember when Stiles was in custody and he began to speak to her? She seemed interested - plus, VanPelt defended Stiles when others were disparaging him. I don't think that Stiles is Red John, but he knows who Red John is for sure. I strongly suspect that there will be some sort of a revelation about VP shortly.
Rigsby is, perhaps, hiding something also. Maybe he is a "Tyger-Tyger" member?
Lisbon is in love with Jane. This by itself is not a problem - but RJ being at large keeps Patrick close to her. If RJ is killed then Jane will likely move on - or find himself back in prison (or whatever). But the bottom line is that for as long as Red John is out there, Lisbon gets to keep Jane close.
I think that Red John is somebody close to the team - but may not be on the list at all. The list is probably just another one of Patrick's games. It may also be a device to divert attention from another person who Jane thinks is RJ. However, that fact that Red John knew who was on the list is proof that Lorelei is still alive. Maybe the body was a long-lost twin?
I am also intreagued by the idea that Red John may be revealed to the audience, but not to Jane, Lisbon & co.
Interesting.
To be honest, RJ could be anybody - but I'm gonna guess Ron for two reasons.
First, he is always there, but never really a part of any story line.
Secondly, his name is like a shortened version of Red John: R-O-N.
Anyway - enjoy the series, folks!