My list would probably be something like this:
1. Krull
2. Living in the Age of Airplanes
3. Sneakers
4. Star Trek III: The Search for Spock
5. Aliens
Why Star Trek III and not II, you may wonder, with II being many people’s favorite? Well, I never really liked the main theme from II, for one thing. I always thought it sounded uninspired an forced. I remember being very disappointed with it, after having been spoiled at that point with all the great Williams themes from the first two Star Wars films, as well as Goldsmith’s wonderful Star Trek: The Motion Picture. Of course, Horner’s ST II theme IS used quite a bit in III also, but III has a lot of other material that I think surpasses a lot of what II has to offer: The Klingon action material, and the music for Spock and Vulcan, particularly the Katra Ritual sequence.