Interesting. As of yet, nobody has chosen Beethoven! There are moments in Bach which bring tears to my eyes, but not in his keyboard music. Though some of his organ music is off the charts, we only have a piano. Two very creative composers not mentioned from this period that have brought me endless hours of fun at the keyboard are Scarlatti and C.P.E Bach, and both of them wrote a lot of music. (I am rather stunned, but I don't think I have even heard any keyboard music by Handel!) Schubert, but not Schumann? Chopin and Liszt but not Rachmaninoff? Mendelssohn? Really? I would be very tempted to take the music of Debussy, with whom I feel great empathy. I could also easily live alone with Chopin, but the island would be too small for me and Liszt! (I would have to leave.) Of those listed, I probably WOULD choose Beethoven, but would be very tempted to choose Brahms, whose music I adore. In reality, I would more likely just improvise so that I could creatively make the adjustment as the piano, with the heat and humidity, gradually turned into a one-man gamalan.
Yes, yes, yes, but a poll is limited to 10 items