Indeed, and enjoyed regularly by packed concert hall audiences with a full live orchestra. Hans Zimmer, John Williams, Ennio Morricone etc. are arguably the great classical composers of the late 20th century.
Classical purists might argue that it's made for visual entertainment and for that reason doesn't count. But if music written for opera and ballet are a legitimate part of the classical canon - and indeed religious music, Bach's masses etc., which equally had a function beyond just existing for their own sake - excluding music from the movies on those grounds feels like little more than snobbery.
The same can be said even of the best video game soundtracks. Not really my world, but I can see the love, skill and artistry that goes in to it.
If you're looking for horns, Mark Ronson's band are worth a listen, they don't have the solo skill of the great jazz players but they hang together well as a band. Solo trumpet wise, Erik Truffaz is worth listening to. Still going strong AFAIK.