Heller is playing us all!  If your theory changes every episode, you're falling right into his trap!
In all honesty, we don't have enough information at this point to prove who RJ is.
Here are my ideas of what to base a good theory on:
Look at the themes of the show (misdirection, deception, a story behind the facade, etc.)
Don't read too much into a single "clue," it can always be a red herring.  For example, Rosalind Harker's description of Roy, RJ's voice, the alleged phobia, whether he killed someone or one of his followers did.
Patrick knows more about RJ than we could ever dream, so pay attention to him.  However, sometimes he is acting, lying, deceiving etc. so we can't always trust what we see!  But remember, he is similar to RJ (tyger, tyger symmetry).