In 1970, the Senate (government) of West Berlin formally granted him the rank of Kammersänger. He was especially acclaimed as the title character in Boris Godunov, a role he performed 39 times at the Metropolitan Opera between 1974–1987, and as Pimen from the same work, as Paavo Ruotsalainen in The Last Temptations, as a Wagner singer who frequently performed at Bayreuth (King Marke, Hunding, Fasolt, Fafner, Hagen (one critic described his Hagen as an "elemental force") and Titurel), as the Commendatore, Sarastro, Dosefei, and Prince Gremin, as King Phillip II, the Grand Inquisitor and, in the later part of his career, the title character in Glinka's Ivan Susanin.