First of all, Patrick Jane? The most stupid theory I've ever heard. Bruno Heller said Jane isn't RJ, also it doesn't make sense.

Bob Kirkland - It can't be someone who comes on in season 5. Also it would be so obvious with handshake. I think RJ killed someone from his family and Kirkland wants to get RJ on his own. But this is just my theory.
Raymond Haffner - It would be disappointment. Maybe, but I don't think so. He is too short in serial.
Bret Stiles - He is too old. Look on RJ behaviour when he met PJ or when he is with Rosalind. It can't be.
Reede Smith - No, no, no
Thomas McAllister - It would be shock.
Gale Bertam - He is so stupid, RJ wouldn't lose in poker. But I think he is involed.

Red John is Brett Partridge. He is from first episode, his voice is very similar with RJ's voice. Rosalind's description - right. Connections in FBI, CBI? I think he has. Also Brett = Red. "A brace of Partridge" is painted by William Blake, the same guy who wrote a poem "Tyger, Tyger" whose RJ cited. Just look on his face - he is a sociopath.