PIka could also be an interesting choice, he seemed less active in this game compared to last where he was town, however that would be hypocritical of me at this point (I can't rule out he was absent for similar reasons as me) and it could just because he didn't want to get mislynched day 1 again.

The guard claim seems solid enough and I doubt he was a likely recruit but if he recruited the guard than he might have felt it safe to claim the role for himself. Still I like the other three I mentioned more a lot better as any case on Pika seems pretty high in speculation as opposed to solid scum tells.
I'm going to dismiss the idea of an Alien SK on top of a cult recruiter. Assuming the Security officer was the same as last game and both guards worked the same (seems likely) that means that even assuming Mitch was telling the truth about the delay to his role (likely), we potentially had a situation where 3 people could have died night 1 with another being recruited. That's just way too high in potential deaths for an 8 player game. 4 people could have even been killed night 2.
@Mudpuppy: For the record, I don't think I ever got around to responding to you saying I thought your theory was plausible. I don't think your theory was plausible as you stated. I don't actually recall directly responding to that one as I had focused onto your other one. For the record, I would consider its mention as relevant to the rest of my points about you with the speculation being a distraction. Any set up where non-town is equal to town doesn't tend to balance out well. An altered set up where 2 people represented a non-town group with possible abilities that would interfere with the alien queen and different method of going about accomplishing their win con besides killing or recruiting everyone in their way was possible at the time. Of course the scene mentioned 3 so that theory would have mostly fallen apart in flavor.