Is Scott Joplin the best known blues guitarist?

Scott Joplin is not primarily known as a blues guitarist; he is celebrated as a composer and pianist, particularly for his ragtime music. His most famous pieces, like "Maple Leaf Rag," played a significant role in the development of early American music but are distinct from the blues genre. While he is an important figure in American music history, the title of "best known blues guitarist" would more accurately apply to artists like B.B. King or Muddy Waters, who are iconic figures in the blues tradition.