Another stupid theory i've already heard:

Red John is not on the list. RedJohn is Dennis Victor (Ray Wise) who was appeared on episode 4x23 "Red Rover, Red Rover"

And just for the following reason: "To make a wink to the TV Show "Twin Peaks" (1990) where he was the famous killer who killed Laura Palmer. 23 years later, Ray Wise is the killer, again."