BK, since you are fond of Street Scene, as am I, I think you might like Johann Strauss, Jr's Der Zigeunerbaron (The Gypsy Baron), which was based on a romantic Hungarian novel. It's a heavier work than Strauss' popular Die Fledermaus, and Strauss' writing is more ambitious. Because there's so much music, early "complete" recordings had to cut numbers to fir the work onto two LPs. Some cuts, like Mirabella's Act One story of her adventures, the Act Two Morals Commission waltz, and Arsena's Act Three ditty, might be traditional performance cuts, but some were because of length. My favorite recording is Harnoncourt's, which is not only complete but attempts to reconstruct Strauss; ambitious Act Two finale. I believe the original full score for the piece was destroyed in the bombing of Dresden, and the New Johann Strauss edition in Vienna, edited by Michael Rot, attempts a similar reconstruction.
Broadway's Franz Allers recorded for Angel/EMI several German operettas. His recording follows the standard cuts EMI established with their monaural recording with Schwarzkopf. It's not bad, and the voices are good casting. Boskovsky's later recording for EMI adds Arsena's Act Three ditty, but I wish I liked her thin little voice better.