Ambience and Music: Medieval Fantasy Music Suggestions

Hey r/worldbuilding! I'm designing a one-shot D&D 5e Heist campaign and while I have the story designed, I'm looking to fill in the blank space of music. I like to include music into all of my campaigns for ambience to help dictate the direction of the story. For this game, I'm looking for a decent stand-in for the jazz style typically found in spy and heist movies from the 70s, and movies like Ocean's 11 (the Clooney/Pitt one).

I figured this would be the place to ask, as well as open up discussions for anyone else looking to incorporate music into their gameplay.