I like the sound of a lot of the 30’s orchestras, some of which you can hear in films. Some that come to mind are the Vitaphone Orchestra, Ambrose, and the orchestras that played in some Astaire films.
Paul Whiteman’s “Japanese Sandman” is classic!
Spin Little Web of Dreams (1934)
I like the Ambrose recordings as well. One of the first blue-label Deccas that I ever picked up at a garage-sale was Ambrose’ recording of Raymond Scott’s “War Dance of the Wooden Indians,” back when I was still in junior-high. Didn’t even know initially that it was a British band.
One thing you might like are the radio transcriptions of Bill Challis, circa 1936 (they were released on the Circle CD label), which really epitomize that bouncy ‘movie musical’ sound, with tunes like “Temptation,” “Dardanella,” and such. Challis had earlier arranged for Whiteman.