Where can I find music and people who play old blues like this?

I know a fair share of blues guys like SRV,BB king, Buddy guy,Eric Clapton, and that kind of style….

but I really like that old old sound, I guess I’m asking what came before these guys?

One guy I am hooked is Son House – Grinnin in your face

Also how do you find people who still play this kind of music? There is not much a “blues” scene around here least none that I am aware of…......

Thanks as always.