Who contributed most to blues music, after all B.B. King is still alive and well, and touring, but there is no doubt Willie Dixon was one of the blues masters.
Here's a brief bit from his web site about him:
"Willie Dixon has been called “the poet laureate of the blues” and “the father of modern Chicago Blues.” He was indisputably the pre-eminent blues songwriter of his era, credited with writing more than 500 songs by the end of his life. Moreover, Dixon is a towering figure in the history and creation of Chicago Blues on other fronts. While on staff at Chess Records, Dixon produced, arranged, and played bass on sessions for Chuck Berry, Muddy Waters, Howlin’ Wolf, Litter Walter, Sonny Boy Williamson II, and others. In no small way, he served as a crucial link between the blues and rock ‘n roll."
His web site asks:
"Can you imagine what music would be like without such hits as Hoochie Coochie Man, Little Red Rooster, Spoonful, I Ain't Superstitious, I Can't Quit You Baby or My Babe? Neither could many people. Thankfully, we don't have to. Little did the world know that in 1915, the person who made all of this possible would be born."
My answer is a resounding NO!
For a quick list of Willie Dixon's incredible library of songs, and who recorded them, go to this link at Wikipedia…
Please visit the web site dedicated to his memory here… and "Like" his Official Facebook Page here… and you know the drill by now, buy his music.