Its the Aliens Soundtrack.
Its entirely epic, even more so considering that Horner was given no time to do it in, and hadnt seen the completed film.
This, anything Howard Shore did for David Cronenberg (eXistenZ and Naked Lunch are my personal favourites), Waking Life, I listen to a couple of tracks from Sakuran (Heisei Fuuzoku by Shiina Ringo) on a daily basis.Vangelis' soundtrack to Bladerunner, perfection.
Star Wars, John Williams at his absolute finest.