WebPerformer Pages. Ludwig Suthaus (Tristan, tenor) Kirsten Flagstad (Isolde, soprano) Blanche Thebom (Brangäne, mezzo-soprano) Josef Greindl (King Mark, bass) Dietrich Fischer-Dieskau (Kurwenal, baritone) Rudolf Schock (Seemann and Hirt, tenor) Edgar Evans (Melot, tenor) Rhoderick Davies (Steuermann, baritone)