Sounds like you enjoy the old stuff.

Check out Blind Willie McTell, Big Bill Broonzy, Fred McDowell, Muddy Waters, Tommy Johnson, Lightnin Hopkins

For some more electric stuff I would suggest chess records: Muddy Waters output, howling wolfs output, Little Walter.. can't really go wrong with those three.

there are tonnes and tonnes so i'll leave it at that for fear of scaring you away