Here are a few that I like, some of which are well known. If you can't find them, they could possibly go by other titles.
Morning Mood - Edvard Grieg
Tristesse Etude - Frederic Chopin
Claire de Lune - Claude Debussy
Winter (from the Four Seasons) - Vivaldi
Liebestraum - Franz Liszt
Piano concerto No. 21, Adagio (aka Elvira Madigan) - Mozart
Gymnopedie No. 1 - Eric Satie
Serenade - Enrico Toselli
Aquarium - Saint Saens
The swan - Saint Saens
Overture No. 3 Air - Bach
Concerto for 2 Corni da caccia - Heinichen
Trumpet Concerto in E flat major - Haydn
And if you have the WDW cd that has the music from Impressions de France, you might consider using it

.