A few opinions of mine:
1) Three dot tattoos are for followers/members of the Tyger Tyger organization therefore none of the three with the tattoos are RJ
2) I don't think Brett Partridge faked his own death but I would love it if he did and turns out to be RJ
3) Haffner seems like my second suspect because he fits all the physical descriptions from Rosiland Harker plus he just seems like a genuinely weird guy
4) Bret Stiles is probably going to die soon from whatever disease he has