Mashburn was my favourite RJ suspect for a long time but after all this show, I'm not so sure.

I didn't take Rosalind description as valid and voice theories was stupid. Genius like RJ would use his real voice and give his enemy a big clue, c'mon.

I really don't have any idea who is RJ but as i say before it must be a person that posses qualities of PJ, Stiles and Masburn.
Lorelei would not fall for money or expensive gifts, so that man must be PJ No 2.

About the list:  McAlister look like person who like PJ and others don't posses the qualities needed and Stiles is too old.