And who would be an example of underrated ?
I'd ALMOST call Bill Bruford underrated because I don't think a lot of people know who he is. Unfortunately he officially retired from performing live a few years ago.
I was lucky enough to see him with King Crimson in the middle '70s.
Wow, I would've loved to have seen that version of King Crimson live. Unfortunately I didn't become a Crimson fan until the late 1980's. I've only seen them once, I believe in 1995, when they toured with their "double trio" of two guitarists, two bass/stick players and two drummers. Bruford was part of this. It was a fantastic show, LOUD, but amazing.
Robert Fripp and Greg Lake? I think some of King Crimson ended up in the band "Foreigner". If you listen to their first album you can hear the influence. Woodwind instruments etc.
Yep, Ian Macdonald, not sure on the spelling of his last name, an early King Crimson member, was in Foreigner. And Greg Lake, a Crimson member on their first two albums, of course went on to fame when he Emerson and Palmer formed Emerson, Lake and Palmer. And Boz Burrell, an early member of Crimson, went on to join Bad Company, which was led by Paul Rodgers.