Soft Metal

[El-Shoggoth]

There are a lot of melancholic and "folkish" black metal bands that are barely metal.

Agalloch
Alcest
Woods of Ypres
Empyrium - their later material has no electric guitars at all
Drawn
Uaral (folk/doom from Chile, very beautiful stuff)

 

[Eligos]

Try Memoria Vetusta II as well.

https://www.youtube.com/watch?v=yxU12oSG0yY

It's more like ambient darkwave than it is black metal at points.