John Williams. Discussion OVAH!
Agreed. His Star Wars, Superman and Indiana Jones themes are some of the best out there. In the case of The Temple of Doom, I hated the movie, but loved the music. The one time Williiams disapionted me was Return of the Jedi. I HATE, HATE, HATE the Ewok themes. Thankfully, he replaced his awful Ewok theme at the end of Jedi with that instrumental piece that I thought worked much better.
I should also mention Jerry Goldsmith. I never cared for TMP's opening theme (and hated the fact that TNG co-opted it), but his opening theme for First Contact is my most favorite Star Trek theme.