I remember sitting in my living room in Oklahoma with my parents when Pete Seegar sang, I think, "The Big Muddy," ("we're right in the middle of the Big Muddy and the big fool says to march on...") on the Smothers Brothers show. My father's face turned purple, he of the American Legion, Captain in the U.S. Army, and he raged against the "communist" who was trying to destroy everything he'd fought for. I was a kid at the time and thought it was completely awesome and courageous. It was certainly a line of demarcation in our family. And capsulized the great divide in our country.
For this and other reasons, I vote for Pete Seegar, even though there were others whose voices I liked more or whose songs propagated easier because they weren't so impassioned.