A few UK suggestions
Davy Graham - Folk Blues and Beyond
Anne Briggs - S/T
Shirley and Dolly Collins - Anthems in Eden
ISB - Hangmans Beautiful Daughter
Pentangle - S/T
Nick Drake - 5 Leaves Left
Archie Fisher - S/T
Watersons - S/T
Young Tradition - S/T
Martin Carthy - S/T
Lonnie Donnegan - Showcase

Every one a gem!

Cheers
LL