Harry Potter soundtrack

It just occurred to me, as I listen to the soundtrack to HP:Goblet of Fire, that there aren't a lot of memorable themes. Certainly, Hedwig's theme (the main motif of the soundtracks) is recurring in the movies, but I there isn't a readily recognizable "Voldemort's theme" or "Luna's theme." Certainly ominous music for the bad stuff, light music for the fluffy sequences (um, not meaning the dog, by the way), but character-related motifs are missing. I suspect they are there, somewhere, but they don't stand out, like Leia's theme, or Vader's theme (the Imperial March).


Maybe I'm wrong...I'll have to listen through them again!