Check out the Pimoroni HyperPixel 4.0
but… it may depend on what GPIO pins are used by pisound or any other Audio hat (if you want audio). If just doing MIDI, then you probably dont need to worry about that.
EDIT - a USB MIDI adapter is a cheap/easy way to get MIDI
EDIT EDIT: Another option – “The Raspberry Pi 7” touch display – it uses the direct display ribbon connector and leaves the GPIO pins free."