Yazoo Records made wonderful compilation albums of those beautiful 78s made by the likes of Charley Patton, Blind Lemon Jefferson, Mississippi John Hurt, Skip James, Bo Carter, Skip James, Blind Willie McTell, Scrapper Blackwell and others.
Their sister label, Blue Goose, is another good source for vinyl in this vein.
Not sure about best vinyl sources but Son House is awesome.
Lightnin’ Hopkins. Leadbelly.
Unfortunately can’t speak to vinyl pressings with any specificity, but nobody beats Django Reinhardt.
Leo Kottke’s an amazing player
Bert Jansch is wonderful
I think Chet Atkins is a god but a lot is he and his gorgeous Gretsch, not acoustic.