Pete Seeger (May 3, 1919 – January 27, 2014)

Wikipedia - "Peter 'Pete' Seeger (May 3, 1919 – January 27, 2014) was an American folk singer. A fixture on nationwide radio in the 1940s, he also had a string of hit records during the early 1950s as a member of the Weavers, most notably their recording of Lead Belly's 'Goodnight, Irene', which topped the charts for 13 weeks in 1950. Members of the Weavers were blacklisted during the McCarthy Era. In the 1960s, he re-emerged on the public scene as a prominent singer of protest music in support of international disarmament, civil rights, counterculture and environmental causes. ... Seeger was one of the folksingers most responsible for popularizing the spiritual 'We Shall Overcome' (also recorded by Joan Baez and many other singer-activists) that became the acknowledged anthem of the 1960s American Civil Rights Movement, soon after folk singer and activist Guy Carawan introduced it at the founding meeting of the Student Nonviolent Coordinating Committee (SNCC) in 1960. ..."
Wikipedia
NYT: Pete Seeger, Songwriter and Champion of Folk Music, Dies at 94 (Video)
AllMusic: Artist Biography by William Ruhlmann
YouTube: Pete Seeger on "The Johnny Cash Show" complete and uncut, Pete Seeger, Sonny Terry, Brownie McGhee - Down by the Riverside, Pete Seeger Music From Oil Drums, Waist Deep In The Big Muddy

2009 May: To Hear Your Banjo Play (1947), 2009 Sepember: Rainbow Quest, 2011 February: Talking Union and Other Union Songs - The Almanac Singer.