Rick Wakeman pioneered the use of concentric melodies in rock music, though Bach was doing it nearly 300 years ago. This means he would create a melody line with one hand and a harmonically related countermelody with the other - at the same time - with different intervals. McCoy Tyner is a jazz pianist that does the same thing. Kinda like driving a car with a separate steering wheel for each front tire. Major props!
The current member line-up of Yes consists of Chris Squire, Steve Howe, Alan White, Oliver Wakeman, and David Benoit. The main page should be edited to reflect this. Jon Anderson and Rick Wakeman are not currently members of Yes.