@n80, yup, I'm a big Little Walter fan, and have his Hate To See You Go LP on Chess Records. I worked with a guy up in the Bay Area (Gary Smith) who goes for the same tone outta his harp as did LW, sax-like. Gary mentored with Charlie Musselwhite for a while in the 70's, and worked in Robben Ford's band when Robben live in San Jose. If you can find it, consider buying Gary's Up The Line album (CD only), it's real good, pure Chicago style Blues.
My favorite Blues is that which swings, shuffle rhythms (they're fun to play, too). Give a listen to Lowell Fulson, a song like "Reconsider Baby", a classic.