A very comprehensive guide to that indispensable aid to rockin’ out, the umlaut.
So, has he missed any? And who would benefit from a couple? I nominate Radiohead, and I’d add 'em, but I have no idea how to do 'em. I do not rock.
They got my personal favorite umlaut-users, Moxy Fruvous. 
Ah, damn…I thought I was going to able to mention Djörk, but they’re already in Wikipedia…
The Whïte Strïpes, seems pretty cool IMO. 
Just thought of one: Bjorn Again, the Abba tribute band/s. And if I could figure out how to do the damn things, I’d give Tom Jones a pair.