Masq is probably the most obvious choice there, so I don't think I have to explain my reasoning as I think everyone who has read the thread will understand.
jodogohoo is sort of a gut/impulse choice, as I feel like he's said just enough so that people won't see him as too much of a lurker, but not enough so that he will be heavily accused.
As for Veldril and Bill Murray, I'm mostly lumping them together because of their posting tendencies. This is my first game of Mafia (though I've played in real life), but from reading the few strategy guides/previous threads, it seems like one of the most important roles of scum is to stir up confusion and/or create arguments. It seems Veldril and Bill Murray have done a pretty good job of doing this and honestly, even if they are townies I wouldn't mind seeing them go since it would lead to fewer posts haha.