Fred Neil
Fred Neil (March 16, 1936 – July 7, 2001) was an American folk singer-songwriter in the 1960s and early 1970s. He did not achieve commercial success as a performer, and is mainly known through other people's recordings of his material – particularly "Everybody's Talkin'", which became a hit for Harry Nilsson after being used for the film Midnight Cowboy. Though highly regarded by contemporary folk singers, he was reluctant to tour (something he shared with Nilsson), and mainly spent the last 30 years of his life assisting with the preservation of dolphins.
source: Wikipedia