The X-Men have so many great female characters that one popular X-series, Excalibur, started off with a team with a 3:2 female to male ratio. Kitty, Meggan, and Rachel, along with Kurt and Brian were an incredible team of heroes in a highly original and very popular book - From the Eighties!
She's forgotten now (sadly), but Meggan was a well-drawn character for a time, along with everybody else from that series.
Then you have the female villains from Excalibur like Saturnyne and Gatecrasher. And great secondary characters like Courtney Ross, Cerise, and Roma. Such fond memories...