Bah. All the greats already got their nods - so I'll second Bernard Hermann (name-dropping Fahrenheit 451
), Jerry Goldsmith, John Williams and Howard Shore. Lately, Bear McCreary has wowed me, but I've only just gotten into BSG while those lot would be on the tip of my tongue for years now.
This said, I'll give additional nods to Gottfried Huppertz for his brilliant score in Metropolis
(and Die Nibelungen
), and also note I really liked Clint Mansell's work in The Fountain