Angela Gossow wasn’t the first woman in Heavy Metal, but she may have been the first woman to sing the Death Metal, Death Growl. She is the first I ever knew of anyway. For years she was the lead singer for Arch Enemy. Then she stepped down to be the manager of that group (and a couple of others).
This is “My Apocalypse” by Arch Enemy from the 2005 album Doomsday Machine. Angela Gossow was still lead singer at the time, doing her signature Death Growl. Here’s a link to the lyrics, because Death Growl.