And...Touhou has a bunch. Utshuo Reuji from 11, of course. Remillia from 6. Yuyuko from 7. Those are among the top 10 bosses in a series that is all about bosses.
Don't forget Flandre! Probably the best boss in the series.
Anyway, what is it about Fire Emblem's final boss that makes it so great? Sure, it's probably the best in the series (barring HM Ashnard), but FE is a series known for having pretty lackluster final bosses. If the Fire Dragon moved, then we'd have a real contender!
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http://www.youtube.com/watch?v=SBpfwpOPXNc&NR=1&feature=fvwp
I watch Planet Chasers Starlight Excellent all day, every day.