This is a lighthearted retrospective feature listing 1970s rock bands celebrated for their distinctive vocal harmonies, rather than a hard news story. American Songwriter highlights four groups whose layered, multi-voice arrangements have left a lasting impression on listeners decades later.

The article profiles the Eagles, who rotated lead vocals mainly between Don Henley and Glenn Frey and built their reputation from their 1972 debut onward; Chicago, active since 1969, known for hits such as "If You Leave Me Now"; Fleetwood Mac, which shared lead vocal duties among Christine McVie, Stevie Nicks and Lindsey Buckingham on songs including "Dreams" and "Go Your Own Way"; and Kansas, formed in 1974, whose 1976 breakthrough "Carry On Wayward Son" remains their signature harmony-driven track.

– Eagles: rotating lead vocals (mainly Henley/Frey), debut album 1972
– Chicago: formed 1969, harmony hits like "If You Leave Me Now"
– Fleetwood Mac: shared leads among McVie, Nicks and Buckingham
– Kansas: 1976's "Carry On Wayward Son" is their harmony highlight