Artists like Iron Butterfly

Spirit was an American rock band founded in 1967 and based in Los Angeles. Their most commercially successful single in the United States was "I Got a Line on You". They were also known for their albums, including their self-titled debut album, The Family That Plays Together, Clear, and Twelve Dreams of Dr. Sardonicus.

Humble Pie are an English rock band formed by former Small Faces vocalist and guitarist Steve Marriott and former Herd vocalist and guitarist Peter Frampton in Moreton, Essex, in 1969. The original line-up was completed by former Spooky Tooth bassist Greg Ridley and former Apostolic Intervention drummer Jerry Shirley. They are known as one of the first supergroups of the late 1960s and enjoyed success in the early 1970s with songs such as "Black Coffee", "30 Days in the Hole", "I Don't Need No Doctor", "Hot 'n' Nasty" and "Natural Born Bugie". Frampton left the band in 1971 and was replaced by Clem Clempson.

Ten Years After are an English blues rock group formed in Nottingham in 1966. They had eight consecutive albums in the Top 40 on the UK Albums Chart between 1968 and 1973. They also had twelve albums enter the US Billboard 200. The band are best known for tracks such as "I'm Going Home", "Hear Me Calling", "I'd Love to Change the World" and "Love Like a Man".

Big Brother and the Holding Company are an American rock band that was formed in San Francisco in 1965 as part of the same psychedelic music scene that produced the Grateful Dead, Quicksilver Messenger Service, and Jefferson Airplane. After some initial personnel changes, the band became well known with the lineup of vocalist Janis Joplin, guitarists Sam Andrew and James Gurley, bassist Peter Albin, and drummer Dave Getz. Their second album Cheap Thrills, released in 1968, is considered one of the masterpieces of the psychedelic sound of San Francisco; it reached number one on the Billboard charts, and was ranked number 338 in Rolling Stone's the 500 greatest albums of all time. The album is also listed in the book 1001 Albums You Must Hear Before You Die.

The Amboy Dukes were an American rock band formed in 1964 in Chicago, Illinois, and later based in Detroit, Michigan. They are best known for their only hit single, "Journey to the Center of the Mind". The band's name comes from the title of a novel by Irving Shulman. In the UK, the group's records were released under the name of the American Amboy Dukes, because of the existence of a British group with the same name. The band went through a number of personnel changes during its active years, the only constant being lead guitarist and songwriter Ted Nugent. The band transitioned to being Nugent's backing band before he discontinued the name in 1975.

Ultimate Spinach was a short-lived American psychedelic rock band from Boston, Massachusetts which was formed in 1967. In terms of style and national recognition, the band was one of the most prominent musical acts to emerge from the "Bosstown Sound", which was a marketing campaign posing as a regional attempt to compete with the San Francisco Sound. During the group's existence, they released three albums, with their self-titled debut the most commercially successful.

The West Coast Pop Art Experimental Band (WCPAEB) was an American psychedelic rock band formed in Los Angeles, California, in 1965.

The Animals are an English rock band formed in Newcastle upon Tyne in 1962. Their original lineup consisted of singer Eric Burdon, guitarist Hilton Valentine, bass guitarist Chas Chandler, keyboardist Alan Price, and drummer John Steel. Known for their gritty, bluesy sound, they balanced tough, rock-edged pop singles against rhythm-and-blues-oriented album material, and were part of the British Invasion of the US.

Mountain was an American rock band formed on Long Island, New York, in 1969. Originally consisting of vocalist-guitarist Leslie West, bassist-vocalist Felix Pappalardi, keyboardist Steve Knight, and drummer N. D. Smart, the group disbanded in 1972, but reunited on several occasions prior to West's death in 2020. They are best known for their 1970 smash hit song "Mississippi Queen", which remains a staple of classic rock radio, as well as the heavily sampled song "Long Red", and their performance at Woodstock Festival in 1969. Mountain is one of many bands commonly credited with influencing the development of heavy metal music during the 1970s. The group's musical style primarily consisted of hard rock, blues rock, and heavy metal.

Free were an English rock band formed in London in 1968 by Paul Rodgers (vocals), Paul Kossoff (guitar), Andy Fraser and Simon Kirke. They are best known for their hit songs "All Right Now" and "Wishing Well". Although renowned for their live performances and non-stop touring, their music did not sell well until their third studio album, Fire and Water (1970), which featured the hit "All Right Now". The song helped secure them a performance at the 1970 Isle of Wight Festival, where they played to an audience of 600,000 people. In the early 1970s they became one of the best-selling British blues rock groups; by the time they disbanded, they had sold more than 20 million records worldwide and had played in more than 700 arenas and festival concerts. "All Right Now" remains a staple of R&B and rock, and has entered ASCAP's "One Million" airplay singles club.

James Gang was an American rock band formed in Cleveland, Ohio in 1966. The band went through a variety of line-up changes until they recorded their first album as a power trio consisting of Joe Walsh, Tom Kriss (bass) and Jim Fox (drums). Dale Peters replaced Kriss on bass for the band's second and third albums. Two of the band's songs, "Funk #49" and "Walk Away", continue to be popular on classic rock and AOR stations.

Blind Faith were an English rock supergroup that consisted of Steve Winwood, Eric Clapton, Ginger Baker, and Ric Grech. They followed the success of the members' former bands, including Clapton and Baker's former group Cream and Winwood's former group Traffic, but they split after a few months, producing only one album and a three-month summer tour.

Wishbone Ash are a British rock band who achieved success in the early to mid-1970s.