the man asked for MINOR KEYS people. some of the recommendations, while lovely, do not fit the request.
what you are looking for is THE WELL TUNED PIANO.
and look the price is just right:
Amazon product ASIN B000009HZ9
(if you can't find download PM me)
also:
Toru Takemitsu : The Complete Solo Piano Music
tons of solo piano by Morton Feldman - if you like it melancholic and sssssllllloooooowwwwwww... the one to start is "For Bunita Marcus". it is amazing.
Harold Budd's last or before last record is solo piano, and gorgeous.
and this is a very enjoyable record, played by Herbert Henck:
Hans Otte - Das Buch der Klange
on jazz tip does Mal Waldron have many solo albums? don't remember... there must be quite a few.
does Misha Mengelberg have many or any solo outings? i'm not sure...
John Tilbury has some pretty amazing solo records out but *may* be slightly "difficult" for non initiates
can't recommend Cecil Taylor because i don't get that stuff at ALL.