New roles need to be made and implemented. There's been many times when I've made a setup and thought, 'I wish there was a role that did that'. The current roles have either been used too much or can't be used at all in Main (tree). We should open a suggestion thread where we can submit role ideas and the best ones become roles we can use on the site.
there's plenty of roles that can be created that are non gimmicky. War Demon for example plays like a yak, mafia and cultist and converts others into traitors. That's 4 non gimmicky roles in one package.
also there's 2 role ideas that I submitted in the sandbox suggestion thread, the Sumo and the Sage. Both would work well in Main.