i think RJ can't be Jane, he must be someone who knew Jane before he first started murdering people; my argument is a little clumsy : the RJ smiley looks quite like Jane's face especially the eyes, i believe RJ is someone who's obsessed with Jane and who's killed his family not because Jane mocked him but because of his obsession with him, it's not all, remember what Lorelei asked jane to bring as a present to be his friend : Lisbon's dead body; if RJ really wanted to see Jane's change of heart he could ask anyone's dead body from Jane,the Jane who can't kill a fly, but no, he was more meticulous, he asked for the body of someone Jane cherishes the most, but who would know the person Jane cherishes the most (except Jisbon's fans and Bosco), if he is not someone obsessed with JAne, probably a woman, remember the case where the victims wrote at the wall "he is a man", i don't think it was the victim's writing.

i think some suspects, especially those who were murdered, should be removed from the list: Craig, Dr steiner, Wainwright, bosco and Lorelei; at the mean time i don't have tangible evidence to accuse any one of them but i suspect brenda shettrick and Oscar Ardiles to work for RJ.  
i have a question, why Wainwright was murdered by RJ? was he an accomplice?