Tales from Topographic Oceans ... critics panned it but I've always thought this was the epitomy of their music while Rick Wakeman was with them ...
Awakening is a more mature piece that perhaps expresses their form better ... they started this with the 3rd movement in performance with Jon Anderson on harp ... which I thought better aligned with the progressive rock styling ...
My favorite is All Good People ... I'm a chess player ...
ETA: Steve Lehto mentioned Yes in his video today ... what a strange coincidence ...
Roundabout, Starship Trooper, Yours is no Disgrace, Long Distance Runaround, Heart of the Sunrise, It Can Happen, Mood For a Day, Awaken, Love Will Find a Way, Close to the Edge