Well, here's my ignorant list.

I'm still a relative novice in the world of the blues, but hopefully this isn't too horrible.

I'm just basing this on what I've come to understand as artists of particular innovation, not really on "favorites".
Of course, this will have to be cleared with Satchmo.
Charley Patton
Lonnie Johnson
Blind Willie McTell
Robert Johnson
T-Bone Walker