I know this isn't really following the format nor is it an actual role idea, but rather a discussion about creating roles.
The Role Ideas thread is for creating roles to add to the game, but there's not really a need for doing so. For now, everything is perfectly fine and balanced so there isn't really a need for this thread to exist. Adding more roles would create more problems instead of solving them.
Unless we're assuming the old roles are getting boring, then yes, adding more roles would make the game a lot more fun. But I feel like it's smarter to use this forum for fixing roles that already exist, such as the spy and poisoner. Maybe it would be better to use this form to suggest role fixes than completely new roles? Or perhaps suggest new game modes that aren't too ridiculous.
Assuming the community does want new roles, then perhaps everyone should work together to create a role or fix current roles. It'd interesting to see a role created and developed by the everyone.