 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).He occasionally played Mime, for example in La Scala's 1975 production staged by Luca Ronconi, designed by Pier Luigi Pizzi, and conducted by Sawallisch.His other commercial recordings include the Otto Klemperer recording of "The Magic Flute" (1963), as Monastatos, and the Georg Solti Decca recording of "Elektra".