Artists like John Denver

Seals & Crofts were an American soft rock duo formed in 1969 by Jim Seals and Dash Crofts in Los Angeles, California. They are best known for their hits "Summer Breeze" (1972), "Diamond Girl" (1973), and "Get Closer" (1976), each of which peaked at No. 6 on the Billboard Hot 100 chart. Both Seals and Crofts were publicly outspoken advocates for the Baháʼí Faith. Though the duo disbanded in 1981, they reunited briefly in 1989–1992, and again in 2004, when they released their final album, Traces. Seals and his younger brother, the charting singer-songwriter "England" Dan Seals, later performed publicly together as Seals & Seals.

Pure Prairie League is an American country rock band which featured in its original lineup singer and guitarist Craig Fuller, drummer Tom McGrail and steel guitarist John David Call, all from Waverly, Ohio. Fuller started the band in 1970 and McGrail named it after a fictional 19th century temperance union featured in the 1939 Errol Flynn cowboy film Dodge City. In 1975 the band scored its biggest hit with the single "Amie", a track that originally appeared on their 1972 album Bustin' Out. Pure Prairie League scored five consecutive Top 40 LPs in the 1970s and added a sixth in the 1980s. They disbanded in 1988 but regrouped in 1998 and continue to perform. The line-up has been fluid over the years, with no one member having served over the band's entire history. The band's most recent line-up consists of multi-instrumentalist John Heinrich, drummer Scott Thompson, keyboardist/guitarist Randy Harper, guitarist Jeff Zona and bassist Jared Camic. Other notable musicians to have played with Pure Prairie League include guitarists Vince Gill, Gary Burr and Curtis Wright.

Peter Seeger was an American singer, songwriter, musician, and social activist. He was a fixture on nationwide radio in the 1940s, and had a string of hit records in the early 1950s as a member of The Weavers, especially 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, Seeger re-emerged on the public scene as a prominent singer of protest music in support of international disarmament, civil rights, workers' rights, counterculture, environmental causes, and ending the Vietnam War.

Crosby, Stills & Nash (CSN) was a folk rock supergroup composed of the American singer-songwriters David Crosby and Stephen Stills and the English-American singer-songwriter Graham Nash. When joined by the Canadian singer-songwriter Neil Young, they were known as Crosby, Stills, Nash & Young (CSNY). They are noted for their intricate vocal harmonies and lasting influence on American music and culture, their political activism and their tumultuous relationships.