Right now, I found this Stevie Ray Vaughan concert from 1983 at Ripley's Music Hall in Philly, at Wolfgang's Concert Vault, check out that site, vintage recordings of all the good people! Not just electric blues but acoustic, rare live shows, incredible bunch of music, sign in for free, login and enjoy.
RIP, too bad he took that helicopter ride. 3 of Eric Clapton's band died and the pilot also.
After that I found a James Taylor concert in Berkeley Community theater, Ca 1970, just him and his guitar. Great concert.
I have a recording of him and Joni Mitchell live acoustic, no other musicians on stage, in Toronto, even earlier, even greater show than the Berkeley theater one, the way they interacted on stage made it unforgettable.
Following that up with a Bonnie Raitt live concert at Lenox Music Inn, Ca 1973. All on Wolfgang's Vault. Check it out!