(Credit: Cyrill Matter) Promethean Artists has announced that baritone Elliot Madore has been added to its roster. The baritone has appeared with such organizations as the Metropolitan Opera, Bayerische Staatsoper, Salzburger Festspiele, San Francisco Opera, Sydney Symphony, Cleveland Orchestra, London Symphony Orchestra, and the Tanglewood Festival, among many others. Next up on his schedule are appearances with Calgary Opera this {…}