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Some role ideas:
Inventor
Dayvig (Make sure to add one mafia one though imo)/Suicide Bomber
Inquisitor
Follower/Voyeur
Hammerer
Bus Driver
I just got these from looking at interesting things here.
I can sub I suppose.
I can't guarantee perfect activity but if you need a sub and you want someone who can do what he's told by the leader than I'm your man. Or you could make me a mafia and I could use this post to help prove that I'm village.
I do believe that there is always a species clause in Gyms, TLR, Raids, Tourneys, most facilities, etc, and that players can choose to have one in other battles.
If I'm wrong then I agree that one - or the option of one - should exist.