The big voice himself, Muddy Waters. It's hard to talk about blues without talking about Muddy. He grew up in the Delta, but toured the Chicago circuits. Best of both worlds if you ask me: throwing the slow Delta groove into an electric setting. On top of having the greatest voice ever, he was a phenomenal slide guitarist, and I heard that everyone in his band could play every instrument proficiently when they were challenged at juke joints. Muddy on drums! What a low down shame!
Muddy Waters - Long Distance Call