this is so funny.. sonny boy no2 born 1912 no better than keith relf,born 1943
keith relf was the yardbirds lead singer who would undoubtedly had been influenced and would have copied sonny boy no2.
yes little walter was also a very good harmonica player, but you said of sony boy no2

Was he really great? I don't think so.

and to say he was no better than keith relf
when sonny boy influenced him is a joke,
Bonzo. you are barking   up the wrong tree