I think Hans Zimmer's Dunkirk stands a chance. The soundtrack is dramatic. I've only seen it and the latest edition of Star Wars though, so not much to compare it to. I guess we'll see tonight.
That's actually who I want to win. I don't know if it's likely that Dunkirk will win. It's been overshadowed by the other nominees, but anything could happen. I think it's beautiful, even when you're just listening to the music on its own. It's freaking magical in conjunction with the film.