Actually, I'm also doubtful about Gur and Arandor. They both seem to be vying for the same peaceful role, and I can't tell who is who. Although, Gur is less likely to be another peaceful role that Arandor doesn't seem to be, but he could still be a peaceful role... I don't know, after executing Plesen, I'm afraid to advocate for anything.
We could take a risk and execute Amko as an elf with suspicious behavior, but who knows. I consider Revan to be a peaceful role and I have an idea what kind.
To sell my soul