Definitely Candide first, followed by (in no particular order) West Side Story, Man of La Mancha, Les Miserables, Phantom of the Opera, Kiss Me Kate, and maybe Into the Woods. (By the way, Mitch Leigh, the composer of Man of La Mancha, was a student of Milhaud and when I performed in the pit I loved to point out the polytonal sections. Listen closely and you'll hear it.)