None of these are the killers patrick jane did his own family in n could not accept it he blames a red john character for everything because he leaves in his own disturbed world in a hospital for the insane.
Red john is probably a dr somebody with red hair all these suspects are either patience in a hospital or the staff
Once his boss said , "I am many things to many people." Because he probably ran the hospital
Jane is disillusioned and cannot grip with the real world because f the crime he did.
My guess is blue skies will be a wake up episode odd what's really going on in the present reality. Green thumb will more than likely show him planing trees on the mediums of the highways when they send him to prison for life

This is called the mentalist jane is all about manipulating people minds
I think we have all been had