Unger's other Salzburg Festival roles included Monostatos in two different stagings of The Magic Flute (1967, 1968 and 1970, staged by Oscar Fritz Schuh and conducted by Wolfgang Sawallisch; 1974 staged by Strehler and conducted by Karajan, and Valzacchi in Richard Strauss' Der Rosenkavalier (1969, staged by Rudolf Hartmann, designed by Teo Otto, and conducted by Karl Böhm).
A theatrical production of the play became a priority for Brecht on his return from exile in 1947; he helped to direct its premiere at the Schauspielhaus Zürich, where it opened on 5 June 1948, with scenic design by Teo Otto.
Otto von Bismarck | Otto | Otto III | Otto Piene | Otto I, Holy Roman Emperor | Otto I | Otto Preminger | Otto II | Otto Dix | Otto Natzler | Otto II, Holy Roman Emperor | Otto Binder | Teo Antonio | Otto Skorzeny | Otto Schenk | Otto of Brunswick | Otto Kerner, Jr. | Otto Steinbrinck | Otto Kerner | Otto IV, Holy Roman Emperor | Otto IV | Otto III, Holy Roman Emperor | Otto Braun | Miranda Otto | Frei Otto | Otto-Werner Mueller | Otto Schmidt | Otto Muehl | Otto Lilienthal | Otto Klemperer |