BEFORE they become dinosaurs?

I've got my ticket for Radiohead next week or whenever it is and I'm very excited because I've never seen them before. In my view they are one of the few bands of our generation (b.1985) that are one to tell the kids about in the future.

Saw Prince last year, of course would have preferred him in his absolute prime but blah blah

What are bands you still HAVE to see?