I thus now present the soundtrack to my reading of Harry Potter and the Deathly Hallows:
Patrick Doyle's score to A Little Princess (Doyle did the waltz-friendly score to Goblet of Fire, by the way)
Orchestra-and-piano pieces by George Gershwin, including "Rhapsody in Blue" and "An American in Paris"
Danny Elfman's score to Big Fish (twice), and later his concert piece "Serenada Schizophrana"
Bernard Herrmann's scores to Vertigo and The Ghost and Mrs. Muir
John Williams: all three Star Wars prequels
Gustav Holst, "The Planets" (which, I think, was a musical influence on Williams's "Hedwig's Theme")
Howard Shore's scores for all three Lord of the Rings films