
...You might want to check out Ravel!!! He is known for having composed much of his pieces in 3/4 time, much like Sondheim who always threw in waltzes throughout his compositions.
In fact, Ravel was one of the main inspirations Sondheim took for a lot of the songs in ALNM, and we have Jonathan Tunick to thank for the luscious orchestration. If you particularly enjoy Sondheim and his Waltzes, you should check out:
Literally all of Valses Nobles Et Sentimentales, I insist you check these out.
5' o clock Foxtrot which is an arrangement that is based on his two pieces How's your mug? and Keng ça fou Mahjong from the opera Les Enfant et les sortileges