If it is true that RJ is one of those listed , that means there are 6 innocents . The first to die Partridge . Poor guy , maybe RJ is guilty but Patrick was the one who put him in the list , so Patrick is somehow responsible for his death , and the following .

We have 5 innocents+ RJ , but it is clear that Kirkland is a murderer and, if he is not RJ , then is his accomplice ( who does the dirty work ) would be an insult to say that Bob Kirkland is Red John ( too obvious). So we have 4 innocents and RJ ; Bertram , Thomas McAllister , Bret Stlies , Ray Haffner and Reede Smith .
Now they want us to believe that Ray Haffner is RJ because  the psychiatrist said that he knows whistle very well ( remember that whistles when visit Lisbon in the hospital) , looks good .. etc and maybe it is, but I'm more romantic and I like to give importance to trivialities such as names. Returning to William Blake poem that repeats Partridge in the last chapter .... This poem speaks of an almost divine being that is able to create the beautiful and the terrible, the good and the bad ( the lamb or tiger ) described this being as an artist who uses an anvil , a hammer an oven .. . ie a blacksmith . Reede Smith ( "the red is me" and says the other theory ) .Tagliaferro could be translated in english into Smith
Also whistles in the last chapter when Bertram 's office along

But the most important thing it is that we dont have too many information about him.

Thanks for reading and sorry about my english ( im from Spain)   :)