Mahalia Jackson was an American gospel singer, widely considered one of the most influential vocalists of the 20th century. With her career lasting 40 years, she was integral to the development and spread of gospel blues in black churches throughout the U.S
Thomas Andrew Dorsey was an American musician, composer, and Christian evangelist influential in the development of early blues and 20th-century gospel music. He penned 3,000 songs, a third of them gospel, including "Take My Hand, Precious Lord" and "Peace in the Valley