As I've said in past similar threads, the Elektra Folk Box a four album compilation...now out of print...I wore it out playing it.And I keep posting the same, hoping someday, someone says "hey, Al, I have a clean copy, can I make you a recording?"
as far as most influential, an old Pete Seeger album with "Talking Union", changed my life. I have spent every day for about twenty five years, following Pete's direction... talking union.