I don't think Lazy is the scum we're looking for, he must have just had a chance of survival of attacks. Double A was doing something one of the night's the red text killer killed someone, so I think the controller theory is accurate, in which case Double A was not the source of the red text, but another innocent victim. My gut says GH for the controller, but I don't have much to reinforce that idea, it really could be any of them.

In order of scumminess in my opinion:
GH
choxorn
Jarrema
Lazy