Based on search volume and difficulty, here are the top five tracks pianists search for, plus the specific challenge of each.

For the seasoned pianist. These pieces require stamina, speed, and an almost orchestral sense of voicing.

Most Yanni hits fall into this category. You need agility in the left hand and the ability to play wide intervals.

(If you want, I can search for specific titles and retailers or generate a checklist for purchase — indicate one or more song titles.)