Conversation so far:
What artists did John Denver work with?
John Denver began his recording career with a group that had started as the Chad Mitchell Trio.
Who was in the Chad Mitchell Trio with John Denver?
The Chad Mitchell Trio was John Denver, David Boise and Michael Johnson.
Did John Denver and the Chad Mitchell Trio record any albums?
John Denver recorded three albums with the Mitchell Trio, replacing Chad Mitchell himself as high tenor.
What songs were on the John Denver and the Chad Mitchell Trio albums?
John Denver's distinctive voice can be heard where he sings solo on Violets of Dawn, among other songs.
Did John Denver work with anyone else besides the Mitchell Trio?
Bill Danoff and Taffy Nivert are credited as co-writers of John Denver's song Take Me Home, Country Roads.
Did John Denver win any awards with his song, Take Me Home?
Take Me Home, Country Roads, a John Denver single, peaked at number 2 on Billboard's US Hot 100 singles, certified Gold by the RIAA in 1971 and Platinum in 2017.
Are there any other interesting aspects about John Denver and his relationship with other artists besides the Mitchell Trio, Bill Danoff, and Taffy Nivert?
John Denver formed Starland Vocal Band in 1976. The band's albums were released on Denver's Windsong Records, later known as Windstar Records.
Does Denver's Windstar Records have any other famous artists besides the Starland Vocal Band?
Windstar Records primarily caters to folk music artists and bands, and has signed acts such as Maxine Nightingale and Johnny's Dance Band.

Question: what other artists did his record company work with
Self-contained rewrite: What other artists did John Denver's Windstar Record company work with besides Starland Vocal Band, Maxine Nightingale, and Johnny's Dance Band?