I flipped back and forth between Moraz and Wakeman. I went with Moraz because the one Yes album that he played on probably has as many great keyboard moments as all the Wakeman Yes albums together, in addition to the work Moraz did with the band Refugee and others. But in hindsight, Wakeman's playing on Yes' "Heart Of The Sunrise" is one of my favorite keyboard parts ever. And his Mellotron work on "And You And I" is one of the legendary climactic moments in the genre of progressive rock. It's a toss-up, really.