Hm, thinking this over, I think I maybe am comfortable to say Rickie Vasquez after all. And a kinda-sorta-maybe with the Lois and Clark version of Clark Kent, though there it's complicated by the show sometimes punishing Lois for being "too pushy", even if Clark never did. (Which adds the question of whether we're looking for a character who is, himself, feminist, or one whose position within the story forwards feminist goals.)