Georges Delerue wrote a lot of waltzes, my favorite being La Valse de François T., composed and performed live with full orchestra for a French TV special entirely devoted to François Truffaut's life and career back in 1982. A lenghty TV show with Delerue and Truffaut being interviewed. I was pleasantly surprised to discover it on Nonesuch's Truffaut album, with a passionate performance by the London Sinfonietta, note perfect.
Maurice Jarre also fancied 3/4 writing: some of his Georges Franju scores have odd little waltzes, sometime with broken time signatures, a trademark of this great composer. The main theme from Ryan's Daughter is also a waltz.
The Valse crépusculaire from Providence by Miklos Rozsa is also a favorite of mine.
And for a few years now Alexandre Desplat has been contributing steadily to the 3/4 history. The Birth Waltz is splendid, so is the River Waltz from The Painted Veil. And the Dinner waltz from Lust, Caution has "French music" written all over the manuscript! Odd but refreshing for a film set in China!
There's a waltz-like arrangement of the main theme from The Great Train Robbery (Rotten Row). And what about the waltz from Papillon ? I may be wrong but it feels like Goldsmith only slightly altered the tempo for his concert medley to give the theme a more, dancing, waltz-like arrangement. And speaking of Jerry, the main theme from Kick the Can in Twilight Zone the Movie is also in 3/4 time. And it's such a gorgeous score! I get teary eyed every time I listen to the CD!
I also love the jazz waltz theme from In Like Flint: so elegant and infectious.