Conversation so far:
What artists did John Denver work with?
Denver began his recording career with a group that had started as the Chad Mitchell Trio.
Who was in the group?
The group Denver, Boise, and Johnson, which had evolved from the Mitchell Trio.
Did they record any albums?
He recorded three albums with the Mitchell Trio.
what songs were on there?
his distinctive voice can be heard where he sings solo on Violets of Dawn, among other songs.
did he work with anyone else?
Bill Danoff and Taffy Nivert, credited as co-writers of Denver's song "Take Me Home, Country Roads", were close friends of Denver and his family.
did he win any awards?
CANNOTANSWER.
Are there any other interesting aspects about this article?
His record company, Windstar, is still an active record label today.
do they have any other famous artists?
Denver's solo recording contract resulted in part from the recording by Peter, Paul, and Mary of his song "Leaving on a Jet Plane".

Question: what other artists did his record company work with?
Self-contained rewrite: Besides Peter, Paul, and Mary, what other artists did Windstar work with?