The late sixties English band, Yes, formed by Jon Anderson and Chris Squire in '68, was considered to be a pioneer of the genre, selling fifty million albums. Known by their elaborate arrangements and abstract lyrics, they staged elaborate live performances, at times with the keyboard phenomenon, Rick Wakeman.
Yes hit the big time with "Fragile" in '71 and "America" in '72, based on the Paul Simon song. With constant personnel changes, merging with other bands and going through numerous musical changes, they struck gold again in the U.S. with "Brother of Mine." Still touring, "Fly From Here" in 2010 is a late success, and a possible reunion with Jon Anderson is under discussion.