I s'pose if nobody else is seeing the gkrieg/ss scumteam, I could vote: SpaceAnemone
I really wanted to see that scumteam, and I've been re-reading the whole game to catalogue all the places where the pair of them are basically steamrollering us all into seeing things their way. Sadly, it's just not as compelling a list as I wanted it to be :-(
If they were both to be scum, with one killing each of the NKs, why pick that particular pair to kill, especially with Seprix being under suspicion for being one of the few people posting when the hidden vote came in. I mean, I guess it's not totally unimaginable that as a pair of experienced scums, they'd decide to kill the traitor just to mess with town and finesse things a bit, but that seems a stretch.
Other random thoughts: If there's an SK too, then we'd presumably have to have some super-duper PRs to help us out. Worth bearing in mind if more useful town info comes out, I guess. Is multiple factions of traitors ever a thing? Like could gkrieg be a one-shot vig traitor who can't win if the other traitor is alive? Cylon in-fighting would certainly fit with flavour. That doesn't gel with Silver being the one who Iguana tracked to Seprix, though.
So yeah, much as I'd like to see that, I think for now Gkrieg and Silver are untouchable, as is Iguana. I encourage anyone who's not Gkrieg or Silver to propose more ways in which the game roles might not be what they've been driving us to think they are, though, just in case there's something less implausible that I'm missing.