Bob the Postman - this note might be what you do remember:

"It is interesting that in the early '20's he attended a school for the blind in Macon attended by the great hillbilly artist Riley Puckett, and speculation as to the identity of the "darkey in Atlanta" who taught Puckett his guitar tour de force Darkey's Wail, is intriguing."
Simon A. Napier, Editor Blues Limited (www.ozarkia.net)

Apart from this, my absolute favorite is Willie, too.
Best characterized in short by Steve James (www.acousticguitar.com:

"In the '20s and '30s, Blind Willie McTell was king of a court of Georgia musicians that included Barbecue Bob, Peg Leg Howell, and Curley Weaver. A top-notch set of McTell recordings from this era is The Early Years. From stomping ragtime to mournful slide pieces, McTell had it wired. Simply the best 12-string guitarist ever, and one of the very great blues songwriters."

Something to add...?