Tenor Hans Hopf is not one of the famed Wagnerians of the 20th century, but he certainly was one of the most reliable. Born on August 2, 1916, Hopf studied in Munich and Oslo in his formative years and made his formal stage debut in 1936 as Pinkerton in “Madama Butterfly.” Between 1939 and 1943, he would only appear with {…}