John Williams Ennio Morricone Thomas Newman Danny Elfman Nicholas Britell
Britell's rise with The Big Short, Vice, Moonlight, Battle of the Sexes and If Beale Street Could Talk has put him on my A list. Absolute master of creative orchestrations.
Granted he's probably not quite top 5, but he'd be in my next 5, and one that hasn't been mentioned yet: Mark McKenzie. His score to "Max and Me" last year was very powerful, and he has some very powerful and grand pieces.