On my personal wishlist are Who Brings Shadow (Hades phase1 - we do have different interpretations of the piece available, it being part of the ShB main theme and all, but that one is such a banger) and more recently Shade's Delight (the jazzy tune that is playing in the Reaper "HQ" and a lot of the more lighthearted EW scenes).
Mostly just to have them playing for visitors in housing, for my personal listening and "on the go" I've adopted Spotify playlists, most of the songs we have as orchestrion rolls and the pieces of the OST we don't have as rolls are on there.