music in movies

I have always considered music to be one of the main factors of a successful movie. Some movies such as No Country for Old Men have little to no music but still manage to be very entertaining and thrilling. I personally found that movie to be one of the best I have watched, as the lack of music didnt allow me to know when a certain character was in danger or what was going to happen next.
Movies such as Baby Driver had a great collection of tracks that were all very well timed and made watching your basic car chase scenes very thrilling and intense. What do you guys think? What are some movies you specifically liked because of the music they had?