I followed up Zos' John Fahey lead last week and found some interesting, eerie sounds with ambient atmospherics. Especially the Ragas called Pat 1-4.
He also does a lot of ethnological forgery blues which I have yet to get into.
His Takoma labelmate, Robbie Basho also quite inspired me. He's a lot more cosmic Eastern influenced and hypnotic. He does sing at times but watch out it's lets say, aquired taste.