I was absolutely wonderstruck by Stephanne Grappelli in the Johnny Carson link. I’ve never even heard of him. He plays with such ease, panache with so much graceful swing. This is good stuff.
He kinda reminds of America’s Bob Wills and the Texas Playboys jazz and blues country (western) swing.
https://gpb.pbslearningmedia.org/resource/jazz-blues-western-swing/ken-burns-country-music/
https://www.youtube.com/watch?v=okNgLm4Ilt4
Along with Spade Cooley and his Orchestra: https://www.youtube.com/watch?v=D14M9uW5sF0