What is Scorsese's best soundtrack/score?
Goodfellas is the obvious answer, but I'm going to go with Taxi Driver. I love licensed music when done well, but an original score done well just hits so much harder for me. It's a mix of beautiful and haunting jazz that highlights Bickle's innocent demeanor and horrifying psychology.
I think, while one note, Killers of the Flower Moon has a great score. As does The Departed.