Chromatics and slow dive are good.
clams casino, xxuyyxx, bird ya nam, caribou, slow meadow, the xx... tycho, fourtet...
Baths, glass animals, and... hammock.
so many more...
I'd classify clams as more witch house/triphop/cloud rap/idm. Same for xxyyxx. Ethereal wave has more of a darkwave or gothic rock edge to it whereas Clams and xxyyxx seem to blend some elements of ethereal with other genres.