One thing is certain to me that Jane planted that list on Red John (him smiling on seeing the misplaced tooth pick says it all).

According to the list it will look stupid if RJ is either one of Reede Smith or Sheriff McAllister.

Bret Stiles looks too old to fit as being RJ.

Bob Kirkland doesn't fits the bill as he has been made too certain to be guessed as RJ.

Ray Haffner - It doesn't seems like that he possesses the skills to be RJ. I'll be highly disappointed if he is revealed as RJ.

Now Brett Partridge looks a possibility, but again he also has been made too obvious to be guessed.
If I have to go by the list than my money is on Gale Bertram. His quoting the poetry (from the same writer or something) in one of the episodes can't be a co-incidence.

As I said that I believe that the list is fake, coz it's not Jane's list it's RJ's list.

So, this leaves us with only 3 possible suspects -

1. Jane's Father - I don't think that any father will do these kind of things to his son. So he's most unlikely to me. And also I think Jane will consider his father to be on the list.

2. Teresa Lisbon - "Keep your friends close and your enemy's closer" gives me odd vibes about her. The only thing which goes against her is the description by the blind lady. But I can't understand why RJ will leave a person alive who can explain his personality other than his own accomplices.

3. Patrick Jane - Too much references to the conscious and subconscious thing in the series makes him a highly possible suspect but I do think if that's to be the case
then Jane certainly doesn't knows about his subconscious personality.

So these are the suspects I can think of. Lets hope for a great last season because I don't want this series to have a flat ending. :)