Historically, this was knight-poet of the Middle Ages. They wrote poems about chivalry and love. They’re the ones responsible for the image of the gallant knight on the white horse rescuing the damsel in distress.
In more modern times, a “troubadour” is a singer of folk music. I’ve heard many musicians – usually more traditional, lyric musicians – referred to as troubadours (think Tony Bennett, Michael, Buble, etc.)