Woeful Wednesday -- Otis Rush
In the case of Otis Rush, like many other bluesmen, Mississippi's loss was Chicago's gain. Otis was really instrumental in defining the prototypical Chicago Blues sound.
I first got hip to Otis through a searing version on John Mayall and the Bluesbreakers' "Beano" album, with the newcomer Eric Clapton on guitar. Let's watch Otis do "All Your Love (I Miss Loving)":
Mayall's still doing this