[@Attis] Just thought I'd finally give you some bands. Since I said I would. :P I have a weak spot for a good vocalists in general. But I throw ya some female vocals with metal bands, see if you enjoy them.
https://www.youtube.com/watch?v=VK9qfVQ4Z04 (If you like evanescence, Id be surprised if you haven't heard of this one. But I've been surprised before.)
https://www.youtube.com/watch?v=_1lXdLus2WI
https://www.youtube.com/watch?v=SxOybZcRXhI (skip to 1:05 for music. :P)
https://www.youtube.com/watch?v=UOvZKJlrtk8
https://www.youtube.com/watch?v=KUc9tHagrQw
https://www.youtube.com/watch?v=R_WuXOP8oDg (since you like oceans of slumber, forgive the potato 240p quality. :P)

Enjoy. xP

https://www.youtube.com/watch?v=UrspxLUuZPg <- Oh, and here's a band I'd call hilariously bad, though if you can stomach extreme angst/stupid lyrics. You may even like them unironically. x3 (though if you manage to get though this song, and like it, I can show you the worst they have to offer, I promise you, it's quite bad.) :P