Solo scumbag win. I observed this while dead. It's was pretty funny actually.

I've also seen an auditor lead a town and solo-win in the end.

Though the most interesting game I've played was one where I was Executioner. A different executioner followed the usual strategy of claiming day 2 and trying to get their target lynched. I counter-claimed their lead and they got lynched. It was pretty funny actually... but then I got audited into scumbag