Don't forget the classic Blue Öyster Cult. It was while the newly-formed Motörhead was opening for BÖC in the early 70s that Lemmy and company were infected by the umlaut.
There's also Seattle based band Queensrÿche ("Silent Lucidity").
Parodied, of course, by the brilliant Spinal Tap. (The umlaut goes over the 'n'.)