I'm glad Animagique got a mention, as it's one of my favourite original attraction soundtracks at the resort. The themes from Cinémagique are excellent too, although of course they're all taken from movies. (Les Parapluies de Cherbourg, mostly.)
Pirates goes on the list, of course, but my absolute, all time favourites have got to be the classic Disney tunes played on Le Caroussel de Lancelot in Fantasyland. Just brilliant!