From Roger Hall's list of ten best film scores, I've seen all of the movies except A Place in the Sun although it's only the music from Close Encounters of the Third Kind and Laura that I can remember. For example, instead of its score, Citizen Kane's vivid impact for me comes from the writing, acting, and photography. I vaguely remember the music to Ben Hur although interestingly, I saw the British composer George Benjamin have fun improvising piano accompaniment to the original, silent Ben Hur. Hitchcock's Vertigo is also listed, but for me, North by Northwest, also by Herrmann, is superior, including some arpeggiated proto-minimalsm that to me foreshadows Philip Glass.
For the record, that scene in North by Northwest of barren farmland where Cary Grant's character is buzzed by the crop duster looks nothing like the Indiana it was supposed to be (confirming opinion and spoilers here). And the San Juan Bautista mission in Vertigo has no bell tower like the end of that movie, although it is a great setting for Cabrillo Music Festival concerts. Finally, I have it on good authority that unlike in the Blues Brothers movie, Kokomo, Indiana has no Bob's Country Bunker nightclub.
BunkoSquad, amidst some funny comments on the film, quotes Grant's character in North by Northwest: I'm an advertising man, not a red herring. I've got a job, a secretary, a mother, two ex-wives and several bartenders dependent upon me, and I don't intend to disappoint them all by getting myself 'slightly' killed.