Some of the best music is written for films.
Here are a few to begin with:
Legend - Tangerine Dream
Tron Legacy - Daft Punk
Blues Brothers - Various
Quadrophenia - The Who
1492. Conquest of Paradise - Vangelis
Bladerunner - Vangelis
"Those who cannot remember the past are condemned to repeat it." George Santayana
These are a few of my favorites:
The Good, The Bad and The Ugly - Ennio Morricone
The Mission - Ennio Morricone
Out of Africa - J. J. Barry
Steel Magnolias - Georges Delerue
Platoon - Georges Delerue
Limelight---Charlie Chaplain and the beautiful Claire Bloom.
Chicago
The Girl With The Dragon Tattoo (American version) - Swedish version of the film was better but the soundtrack to the American version was great.
I liked the sucker punch sound track
American Graffiti
That'll Be the Day
Good Morning Vietnam
Forrest Gump
Les Miserables - such memorable songs!
The Commitments
The Big Chill
Rocky III - Eye of the Tiger and I think all James Bond movies have great soundtracks
The Sound of Music (for obvious reasons)
Guardians of the Galaxy
American Graffiti
Saturday Night Fever
Purple Rain
Gettysburg
Blues Brothers
Oh Brother Where Art Thou
Chicago
West Side Story
Just to name a few
"Them ain't no militia, that's the Army of the Potomac!"
Pretty much any film for which Ennio Morricone wrote the soundtrack.
"Those who cannot remember the past are condemned to repeat it." George Santayana