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Fukfacewillie I would have said that Elvis's greatest contribution was introducing white kids to Black music. And he shared that contribution with Buddy Holly among others.
The film includes flashes of Sister Rosetta Tharpe (Yola), Willie Mae "Big Mama" Thornton (Shonka Dukureh), Little Richard, Mahalia Jackson (Cle Morgan) and Arthur "Big Boy" Crudup (Gary Clark Jr.) singing "Hound Dog," "That's All Right" and more – recognizing them as the original vocalists behind Elvis' covers. The movie also shows the admiration between Elvis and blues singer King.
... Thornton, widely acknowledged as the vocal architect of "Hound Dog," made the song a hit, only for it to be eclipsed by Elvis' cover.
... Thornton's story is not unique, as Elvis was influenced by B.B. King, Little Richard, Fats Domino, Jackson, Tharpe, Big Boy and more.
Little Richard argued that he was the rightful heir to the king of rock 'n' roll title, with Berry up there with him. "I sang (rock 'n' roll) a long time before I presented it to the public," Richard told Rolling Stone in 1990. “I really feel from the bottom of my heart that I am the inventor."
https://www.usatoday.com/story/entertainment/music/2022/06/30/elvis-presley-complicated-relationship-black-music/7746069001/