[LFG] Anyone want a one time instance bad guy to join pre-existing game that will be well roleplayed?

If anyone wants to enrich a game by having me join and role play an encounter as a villian of the DM's choosing with them I would love to. Though this isn't an intended goal Id also be willing to be persuaded in game to join them as well. I think this would be a great way to spice up the weekly. I am also willing to play anything although D&D 3.5,4e,and 5e are the games I am experienced with.  Mic and Video available.  if you beg me I might dress up ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I guess I don't got to be evil I can be a quest giver or king or something ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

You might be better suited by Fiasco, Penny for your Thoughts, everyone is Dave, or a PbtA game where there's a less clear role of "antagonist/protagonist". Part of the fun of GMing is getting to play the villains, so I don't know someone who'd farm out a bit part.