Hi everybody,
Firstly, i apologize if my english isn't good at all , i will try to do my best.
I looked a lot about all your theories, it was very interesting. But in my opinion, i don't think Red John is on the list. It wouldn't be a great twist i guess and we all know how BH manage to make us mad with all his tricks.
So here is my theory : RJ is WM.
I know, BH said : « We can trust the list » ; but what is the point if BH talked about the list of names we can see when Patrick is writing on his book ( the list mentions the names of Linus Wagner ; Walter Mashburn and the famous Brett Partridge )
Why should WM be RJ ?
Physically, he corresponds more or less to the Rosalind Harker's description.
His first appearence was in « Redline » ; who mentionned the Red colour.
His last appearence was in « Red Hot » ... Two times Red colour.
He is very charming ; stylish ; very rich and he is a gentleman. He has power with womens. (Like Lorelei Martins)
His third wife liked a lot about medium things. He said that in season 2.
He appreciates a lot Lisbon, that could be explain why he didn't kill her in 6x01.
He also had a relationship with the woman selling luxury cars and was killed in season 2 and as you remember that we know Walter Mashburn in this way, it would have offered a table with... a Tiger.
He shooked Patrick's hand in season 3.
He is in good terms with PJ , and we know all of us that RJ wants a friendship with him.
An important point : He repeated several times to PJ that he is a medium or something like this in season 1. It remind the RJ's letter in PJ's house.
He wears red pull-over.
He has knowledge in explosive stuff.
He is a good manipulator (after all he had a relation with Lisbon and he was the only one who seduces her except Patrick).