Above: Ernst Kozub as Lohengrin
The German tenor Ernst Kozub's career is not well-documented. Born at Duisburg in 1924, he developed a thriving career, singing mainly Wagnerian roles. He performed extensively throughout Germany, and also at Covent Garden and Barcelona.
John Culshaw wanted Kozub to be the Siegfried on Sir Georg Solti's recording of the complete RING Cycle for Decca. It's believed that ill health prevented the tenor from learning the arduous role, and he was replaced as Siegfried by the veteran heldentenor Wolfgang Windgassen.
Ernst Kozub died on December 27, 1971, aged 47, at Bad Soden, Germany. Three weeks prior to his passing, he had sung Tannhauser in Italy. The cause of his early death is uncertain; it has been attributed to leukemia by some sources, and to a chronic heart disorder by others.
Here are some samples of Mr. Kozub's singing:
Ernst Kozub - Die Zauberflöte ~ Dies Bildnis ist bezaubernd schön
Melitta Muszely & Ernst Kozub - Nun In Der Nächt'gen Stille ~ OTHELLO
Claire Watson & Ernst Kozub - WALKURE ~ Act I finale - London 1964 - Solti
~ Oberon