Garrus would be super interesting! If only because I really like seeing how the more sci-fi characters adjust to a not-so-sci-fi game setting. Plus, even absent his tech, I'm pretty sure Space Raptor can find plenty of things to do, and I think many of his deals would clash with the general Unseelie way of life (though I'd still agree with sorting him Unseelie).

...plus I have a huge soft spot in my heart for Garrus for what little I played of ME, I won't lie.