So we likely don't have any vote switching powers, but rather vote canceling powers
I'm making the assumption that no two players have identical powers, which seems likely but is not guaranteed

1. Vote canceller role/boon, targeted (could be anyone)
2. role/boon that cancels a single vote against you (Persolus, Cazero) : Persolus didn't seem very concerned about being tied
3.role/boon that prevents you from casting a vote (Batcathat, Caedorus, Kraken, or me) : This feels like it'd be some kind of weird Neutral.