i think on the list everybody somehow connected to Red John, but neither of them is him. I am starting to think about what if is Van Pelt father. He is or was a football coah or something and we saw that one of the clue was to RJ was the football statue. Van pelt was the crazy boyfriend maybe was his father behind it. Grace has red hair and her name is means mercy, and the Van Pelt is holland close to german, and red is rot in holland too. The tiger tiger...poem is a child poem, sound like somebody used to sing to someone, and in the poem there is a line which says i don't remebre exactly but somewhere i heard that somebody made the beast and the nice one..so that might be related, so he is talking about his children.
And i think Jane and Van Pelt are related and might be their father is the killer. Jane hasn't know about his father since he ran away from the circus, that might be possible that his father started fresh and settled down with a new family as a coach.
