I went with Goblin but might lean to Carpenter or Morricone on a different day. It's that close.
Like most have said, all of these guys have done some sensational work. Glass's Candyman score is a favorite. But I hate his score for Browning's Dracula. I also hate Donaggio's goofy Tourist Trap score, which kept him out of consideration for my top spot. Most of his other work is fantastic.