Partridge and Stiles are way too obvious and Minelli is....just stupid.
Red John is Patrick Jane's father, Alex.
If you read through William Blake's poem, the tiger, you will realize that it is the same creator, the same god that created both the terrifying "Tiger" and the innocent "lamb". They stand so much in opposition to each other that it is tough to believe that they were created by the same hand. This relationship is not unlike the one that Jane had with his father...("Carnies are good people, but you're either with them or you're against them...there is no middle way" - Patrick Jane / "You're a loser, or you're someone who plays the losers" - Jane's father)
In the series' pilot, you will see that John's main accusation against Jane is that he is a "cheap imitator". Sounds like something a disgruntled father would say. (Also indicative of the fact that Jane and John are from the same line of work.) ("Alex, meanwhile, played the role of the showman, due to Jane's superior reading powers" - The Mentalist Wiki) ("Red John thinks of himself as a showman, an artist" - Patrick Jane)
Think of the scene where Jane and his dad are conning a dying girl and Jane hesitates...Jane himself was not exactly the most pleasant of men prior to the death of his family. And to be honest, his father seems ten times meaner/cruel/cunning than he could ever be. ("Thy fearful symmetry" - Red John - Evil, cunning, spiteful. God as manifested in the "Tiger" in the form of Jane's father / Jane - Sympathetic, redemptive, sensitive. God as manifested in the "Lamb" in the form of Jane)
Ultimately they are both divine, just in different ways.
I could go on.
