In case you change your mind, my setup would be the following (borrowed from a crazy mafia guy on mafiascum.net all rights reserved, with a few modifications):
2 Doctors (1 Weak, 1 Normal)
4 Townies (1 of which is a naive Miller, one of which has a one shot Unlynchable ability)
1 Cop (Who doesn't know who the deputy is)
1 Deputy (or backup cop, who doesn't know who the cop is)
1 Cop Enabler (Once killed, the cop and deputy lose their power)
2 Pro-town lovers (commit suicide if their partner dies)
1 Serial Killer
1 Psychiatrist (can cure SK)
1 Mafia Framer
1 Mafia Executioner (one shot ability to lynch someone with have the required votes by PMing me)
1 Pro-town Lyncher (gets special powers after killing the target)
1 Pro-Mafia Traitor (Mafia cop that appears innocent)
1 Pro-town Lie Detector (night action: sends me someone's post to determine if it's truthful or not. Loses ability if someone finds out about it)
So, 18 people, 20 with two extra townies.
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Currently working on GaTEB and KDD (never finished the silly thing).