George “Harmonica” Smith and Little Walter are both examples of predominantly diatonic harmonica players who also incorporated some chromatic into their shows and recordings. Check out George “Harmonica” Smith using it to get a big fat sound here:
Some people say that it was this kind of use of the Chromatic harmonica they gave birth to the harmonica’s nickname, “The Mississippi Saxophone.” Not sure if that’s true or not, but from the tone here I could hear how that might happen. I just love that nickname for the harmonica!
Rock on,
Luke