シャルル＝マリー・ヴィドール
Prominent musicians affiliated with St. John's include organist and choirmaster Clarence E. Watters (at St. John's 1929–1932 and 1952–1976) who was one of Marcel Dupré's "first and most enduring disciples-exponents-friends", and with whom Watters studied in Paris. "One of [the 20th] century’s greatest organ virtuosos", Watters counted Charles-Marie Widor and other prominent organist/composers in his circle of friends and close associates.