What do you think about Goldsmiths and Horners soundtracks,
or Goldenthals for that matter?
Was thinking about this even before you asked.
Goldenhal's - most interesting overall (sampled/environmental sound mixed with orchestra done right), some great musical themes.
Horner's - most effective and thrilling overall in the whole series. Most exciting, hypes up the action even more so while still being a classical orchestral Hollywood soundtrack.
Goldsmiths - when I go back and watch Alien I'm alway's surprised and intrigued by how mysterious and non horror soundtrack the music is. It's very thematically rich. It's a more traditional science fiction score than what you'd expect when you think of the horror of the movie. Also some great and hugely effective uses of minimalist electronics as well. Such as the heartbeat in the Brett sequence, the camera swing in the Space Jockey room.