Oh boy. Well, FMA sets a good, high standard with its characters that's hard to match. Part of the problem is that most Shounen Jump series are freaking lame in their treatment of female characters--they favor a superfastpacedseries that's very guy oriented.

One of my favorite action shounen series ever, period, full-stop, is Kekkaishi, although I'll admit that Yellow Tanabe seems to occasionally forget that Tokine's... you know. there. But when Tokine does appear, she's this massive badass who holds her own against the main character. And then there's Tokine's grandmother (A++) and Yoshimori's mother (A++ A++ A++), who's equal parts awesome and creepy! But Kekkaishi's pretty fabulous, in general.

Now I'm going to sit back and try to think of other good shounen series. Huh.