Bret Stiles is the only one who can be Red John.

1- He is the only one who is able to convince others to kill themselves for him and he uses his spiritual position ...
2- He may actually be a psychic and an evil one.
3- Partridge is only a puppet so are all others...I believe all of them are evils the list of 7 names..

The leaked episode is fake.
There will be surprised..

Red John is actually divided into two. Brains(Stiles) and followers..
The crimes that are signed by a bloody face is Stiles himself.