It's hard for me to pick just one there are so many of his I enjoy, Tea for the Tillerman, Father and Son, Trouble, If You Want to Sing Out Sing Out...
I like folk music too. But there has been good folk music written & recorded since the 1970's. Did you stop exploring music when you left high school? C'mon! I have to go out, but I'll post some really good new stuff later today for all you guys stuck in your youth! Time to enter the 21st century! Hehehe...