A great place to start is the 9CD set called 'Music to the Bournonville Ballets' on Danacord of which the only even moderately sung piece is Herman Severin Lovenskiold's La Sylphide (which is reletively well known in ballet circles). All Danish composers (Gade, Lumbye, JPE Hartmann and others).
Another that pops off the top of my head if Josef Bayer's The Fairy Doll -- Bayer being the same composer who completed Johann Strauss Jr.'s only ballet, Aschenbrodel.
Another that pops off the top of my head if Josef Bayer's The Fairy Doll -- Bayer being the same composer who completed Johann Strauss Jr.'s only ballet, Aschenbrodel.