Ulver - The Assassination of Julius Caesar
Reminds me of Anathema and Alcest, I highly recommend.
If they were synthpop bands I guess
Yeah, they're a little more into electronic style than the quoted ones, but still have the ambient/sad/introspective vibe...
And if you consider the 180º shift in the sound style through the years, from black/doom/whatever metal to a more progressive/ambient/melodic/post rock vibe, the similarities only get bigger...