First suggestion Prophet, name is up for debate jus alll I could think of
Prophet: An old woman that the police used to use to help find bodies and Killers. The mafia got wise to this and cut out your tongue, now you vow to lynch every mafia and evil doer.
Abilities: hes can visit 1 OR 2 people during the night and see all night actions that happened (I.E. lookouts results, detectives results, ALSO could see whether he was witched or bussed depending on options.) The problem is you cannot speak, and when you do it all comes out as gibberish. So you have to yell out nonsense and vote to communicate.
Meta game: I believe it'll add a good PR role with the possibility of being jester, so it'll add to a lot of the confusion
To make sure it's not too OP I made a counterpart for Mafia
Bartender: An old owner of what used to be the hottest place in town until bikers started ruining the place. You enlisted the mafia to help keep the place safe and clean. Now you owe them a debt of gratitude that you'll never be able to pay off.
Abilities: To inebriate one person a night to make them speak nothing but gibberish in day chat. Also could make him stagger to a different target then originally intended.
Meta game: Give's mafia a good way to counter the prophets insinuations. I'm sure blackmailer would do the same, but this adds a lot to the confusion of good leads.
Possible invest pairings: You hear nothing but gibberish around this person... they could be a prophet, but they may also be a bartender
if I did the suggestion wrong lemme know...