Chick singers in metal is so rare. About the only other band I know of to have a female lead is Lacuna Coil. I saw them live, but they were unremarkable in all other aspects.
Oh there's been a few. Ones that instantly come to my mind are
Sacrilege (
or maybe you'd like something from their later days),
Acid,
Bitch (of course! A band that has a woman at the helm and they called themselves "Bitch". Creativity to spare, folks) and of course
Doro (here performing the most classic of songs from her days in
Warlock) who is basically the queen of heavy metal. There I go again all of these are old, who's someone new? Um, you could probably go with
Arch Enemy but I'm not really fond of them so I can't really say much. My
favourite female growlers tend to be transgendered (I wouldn't go playing that around
anyone if I was you.).