So I'm playing Mafia and I brainstorm a few class ideas and am fortunate enough to write them down. They come from the perspective of being fun to play versus being balanced or not interfering with current game flow. Enjoy.
Medium
Support / Advanced Town Non-killing
-Psychic medium that communicates with deceased players at night for benefit of the town.
Basic premise is this person is a player that hears the dead chat with the Russian roulette and all that sh*t and you get to talk to all the dead players at night.
Poltergeist
Evil / Advanced Neutral Killing
-Possess a new player each night, leaving a trail of dead bodies in your wake.
Premise of this guy is that he's a neutral SK-like killer that behaves like a Disguiser.
Lawyer
Benign / Basic Neutral Non-killing
-Can declare a mistrial on any public trial for execution (x) times. There can be no more lynches that day.
Basically, before people get to put their guilty or innocent votes in when someone is being lynched, Lawyer can halt that and declare a "mistrial", this ending the trial for the day and beginning the night sequence.
Had a fourth but realized it was too similar to a current role.