Elisabeth Schwarzkopf
In the 1960s, when Schwarzkopf sang in operas she nearly always sang one of her  five favourite operatic roles: Donna Elvira in Mozart's Don Giovanni, Countess Almaviva in The Marriage of Figaro, Fiordiligi in Così fan tutte, Countess Madeleine in Strauss's Capriccio, and the Marschallin in Der Rosenkavalier.   She was also good at singing Alice Ford in Verdi's Falstaff. On the EMI label she made several "champagne operetta" recordings like Franz Lehár's The Merry Widow and Johann Strauss II's The Gypsy Baron.