There is no way that McAlister is RJ. But I don't think anyone is. 

I fully believe that people on and off that list are part of RJ meaning there are many controlled killers.

People that could be in the RJ group are: Cho - Partridge (Who isnt dead) - Abbott - Wayne Rigsby 

There may be many others but I just came up with the idea.

Why RJ is not McAllister
In 6x08 how does Jane sneak a bird in when he can't sneak a gun in?

After sneaking a bird in... how does he keep it quiet while Bertram and McAllister are talking?

Why does McAllister not mention the taking of a memory. Jane only discusses a possible way that he could have guessed with Lisbon... so for McAllister not to even mention this means he has only been told part of the story (by red john?)

Why is the nun only carrying a knife? RJ surely would have had her seriously injure Jane with a bullet from the nun so he could finish the job.