Louis D'Angelo was an American bass-baritone of Italian birth who was particularly known for his performances at the Metropolitan Opera during the first half of the 20th century. He created roles in the world premieres of seven operas at the Met, including Marco in Puccini's Gianni Schicchi in 1917.

Greer Grimsley (born May 30, 1956 is an American bass-baritone who has had an active international opera career for the last three decades. He has sung leading roles with all of America's leading opera companies, including the Metropolitan Opera, the Lyric Opera of Chicago, the Seattle Opera, the San Francisco Opera, the Gran Teatre del Liceu of Barcelona, and the Houston Grand Opera. He has also performed on the stages of many important European opera houses.

Zachary "Zach" James is an American actor and singer. He is best known for creating the role of Lurch in The Addams Family on Broadway, Abraham Lincoln in the world premiere Philip Glass opera, The Perfect American, Amenhotep III in the Olivier Award-winning production of Akhnaten and for appearances on the television shows, 30 Rock and Murphy Brown. Zachary was named the Most Innovative Opera Singer of 2019 by The Classical Post, Breakout Opera Artist of 2019 by Verismo Magazine and was identified as an industry leader and invited to be an official ambassador for Opera America. He has sung with some of the world's top opera companies and orchestras including English National Opera, LA Opera, Teatro Real, The New York Philharmonic, Philadelphia Orchestra, Opera Philadelphia and NHK Symphony Orchestra Tokyo and made his Metropolitan Opera debut in 2019 in Akhnaten.

George London was an American concert and operatic bass-baritone.

Mac Morgan was an American bass-baritone who had an active performance career in concerts and operas from the early 1940s until the mid-1970s. The Boston Globe described him as a singer "known for his rich tone and enviable diction". After retiring from the stage, he embarked on a second successful career as a voice teacher.
Robert Mosley was an American operatic bass-baritone. Part of the first generation of African-American opera singers to achieve wide success, he performed in numerous opera productions, recitals, and in concerts from the 1950s through the 1990s. In 1957 he won the Metropolitan Opera National Council Auditions. He drew particular acclaim for his portrayal of Porgy in George Gershwin's Porgy and Bess, a role which he portrayed in the landmark 1976 Houston Grand Opera production, on Broadway, and at the Metropolitan Opera among other opera companies both in the United States and in Europe.

Kenneth Spencer, was an American operatic singer and actor. Spencer starred in a few Broadway musicals and musical films in the United States during the 1940s. Frustrated with the racial prejudice he experienced in the United States as a black man, Spencer moved to West Germany in 1950 where he had a successful singing career. He also appeared in a number of German films. His career was cut short when he died in the crash of Eastern Air Lines Flight 304.

Clarence Eugene Whitehill was a leading American bass-baritone. He sang at the Metropolitan Opera from 1915 to 1932. He sang on both sides of the Atlantic and is best remembered for his association with the music dramas of Richard Wagner, and for his recordings of well-known music hall ballads such as "I'll take you home again, Kathleen".