Robert Black, double-bass, March 16, 1956, https://www.robertblack.org, https://www.discogs.com/artist/550261-Robert-Black
https://www.allmusic.com/artist/robert-black-mn0000794103
BUT lists https://www.allmusic.com/album/the-art-of-robert-black-mw0001392236 which is actually by the other one.
Robert Black, conductor, composer, pianist,
Roon gives me one Robert Black, with the photo from the second one above.