Red John is Tolmen Bunting...

18-5-4

He and Jane could have been friends which is a clue.

He is rich, and loves to play games, and is use to manipulating people into doing what he wants. 

He has money to influence anyone including police forces.  

He is good with computers and has a god complex to rule the world by hacking everyones personal information.  He can use their secrets and skeletons in their closets to manipulate them into doing his bidding..

The shop he owns in a front to hide his secrets and give him a secret identity. 

He also has a body guard for protection.

His voice also sounds like the voice of Red John in the first seasons last episode where he recited the poem Tiger Tiger...

He also was very upset that Jane beat him in chess which means they are intelectually equal but he wants to be more clever than Jane.