I never posted anything before but if we can trust Bruno Heller then RJ is definetly one of these 6 characters.I think RJ is Bob Kirkland and the other members of the list are mostly his disciples.If you take a closer  look to each of these characters they have major character flaws.
    Ray probably is the one who killed those farmers with Bob.Bob stays there to clean the murder sight.
    Bret Stiles is the leader of the cult so he probably supported RJ to use him for his purposes, all visualize says is "be the best you can be" so Bob Kirkland was probably was inspired by Bret ofcourse whether Bret knows this or not is a different story.Brett Partridge is the cleaning vrew for the killings he also is a disciple of RJ.After RJ related or RJ disciple related murders he goes first he changes data and he erases the evidince.   
    Gale Bertram if I remember clearly once says "once you find th right lever you can do anything" and he had some trials about bribery or something like that he might not be a RJ accomplice but he looks like a greeedy man and he certainly is corrupt.
    Thomas McAllister might be the one who raped Lorellia's sister.He certainly was interested with Van Pelt and he might be the one giving Frankie O'Keefe the freedom they needed.His attitude was quite pervertish in "Red Hair and Silver Tape" episode.
    Reede Smith looks like a man who enjoys brutalizing people for example the guy he beat up in last episode(Black winged redbird) he was seen when they listened what Sophie miller said.
    Bob Kirkland however is a man with very deep connections, he has visualize, FBI, CBI, and his disciples.How Bob found these disciples isn't that much of a mystery to me.The ones from visualize were probably sent by Bret Stiles, FBI and CBI connections were probably happened over time when Bob found something about their past or when Bob helped them cover something up.But these connections run deep.These disciples are not necessaryly active on his murders but they clealrly help him to cover it up.They gave him information about investigations, they manipulate proofs in RJs favor.If you remember it also they give RJ some good information about Jane and his friends for example "roll tide" or how Jane started to like Christina Frye etc.They twist Janes mind for example Gale Bertram was the first one to mention William Blake and he spesificly wanted to meet Hightower he was so furious about that stunt.Also when Timothy died Bertram did everything he could to push Jane and his co. out of the picture but when Jane outsmarted him RJ(bob) got interested and wanted to play the game a little longer then he planned.
     I think Bob and Jane fist shook hands before a sort time of Jnaes family died.Jane has no good memory about that time span.Bob likes Jane and not just likes Jane makes him feel important because as Jane said he is a showman he wants to get attention and Jane is the one person who always (even before he murdered Janes family) payed him attention.So Bob(RJ) loves really loves Jane he sends his lover to him to feel some connection (maybe he even desires Jane sexually but a homofobic nature so he sends Lorellia).He also wants to be like Jane he tries to imitade him.He doesn't wanna get caught but rahter he wants Jane to join him that way the show never ends.Janes deep bonds with his family and friends makes him angry but also he doesn't want to upset Jane more(I mean he is trying to convert him and killing his friends won't be a good sign of good will).RJ watchs every step Jane makes.For example the limo scene where he makes someone inform CBI about his mental situation.He in a twisted way wants to also punish people that really pisses Jane off.