It's hard to describe this guy. The "nocturnal" quality of Davis's playing and his somber reputation, along with his whispering voice, earned him the lasting moniker of "prince of darkness", adding a patina of mystery to his public persona. But when he played he was pure genius. One of his earlier works, Round Midnight, is still one of my favorites. I added it below. Hearing it, it always smooths out my emotions. And on a side note, that's a young Herbie Hancock on the piano.
Enjoy.