Bass Stephen Clark has joined the roster of Athlone Artists. The Tulsa native has enjoyed an international opera career that has seen him perform with such organizations as the Theater am Goetheplaz, Seagle Music Colony, Central City Opera, Chautauqua, Fort Worth Opera Festival, Sarasota Opera, and Theater Bremen in such operas as “Alcina,” “L’Italiana in Algieri,” and “Don Giovanni,” among {…}