Oh, I'm all about metal. I have around 2,800 songs on my playlist and I'd say about 75% of it is metal.
Here's some bands I think you'd like (based on the bands you just listed) that are less known. For all I know you probably already know a lot of these:
Katatonia Elis Dark Tranquillity After Forever Amorphis Soilwork Paradise Lost Opeth Sirenia Tristania Arch Enemy
That's also just a little of what I have. But they're worth YouTubing!