Best blues guitarist, Clapton or Green

I saw the 1969 Rolling Stones concert with Mick Taylor, it
was the most god awful concert (old Spectrum, Philly). The only redeeming factor was that BB King was the opening act.
I saw in England in 1969 the Rolling Stones, they were god awful. The only redeeming factor was the Yardbirds with BOTH Jeff Beck AND Jimmy Page was the opening act. They put the Rolling Stones to shame. Eric has repeatedly stated he will not reform Cream with Jack Bruce.

WOW, Beck AND Page + Yardbirds 1969, Mam, those were the days! Indeed! Did you happen to see the Who as well in England? I never had the chance to see the Who, especially their Quadrophinia tour, heard it on King Biscuit Flower hour, very nice live.

It was 1967. I never saw the Who. The Yardbirds were in the movie Blow Up, the Who turned it down. The Beck/Page duo
recorded only four songs ( one being a radio commercial for
great shakes drink).

Hey, what about Robert Johnson? Or is that going back too far? He's the blues man.

Already mentioned. Acoustic guitar master; knows what and why for each and every note played.