Tito Gobbi was one of the greatest Italian baritones of the 20th
century. His most memorable roles were Scarpia (in Puccini's Tosca) and
Verdi's Falstaff, among dozens of Italian operas that he recorded. He
was also one of the best actors among opera singers, a talent which
enabled him to both act in a dramatic role and sing in the 1949 movie
'The Glass Mountain'.
Actor Robert Davi first trained for opera under Tito Gobbi's supervision, but Davi injured his voice (somehow), dropped out of opera, and became a movie-actor instead.