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You might want to check out shena8, who writes a lot of five-things covering a variety of characters, including many of the secondary characters, as well as cerebel_fics, mostly slash, but some really good imagery, and intense character interactions.

I'm putting together a community for SGU fic recs (sguficrec), which should be live in a couple of weeks (RL permitting, of course), so if you find any recommendations you'd like to pass along...