With the exception of Chariots of Fire, we could probably argue that is every movie that's ever won.
Well, it's the Internet, so people could (and would) argue anything, but I think at least some of the arguments would be pretty bad.
I'll preemptively concede that every moderately intelligent person can link one thing to another if they're sufficiently motivated (see: every conspiracy theory), but what I'm thinking of is something that requires zero steps. I could probably BS my way through arguing that
Birdman is actually about celebrity culture or mental health or whatever, but then I look at
Parasite, whose relevance to the moment requires no intellectual lift whatsoever, and a distinction becomes clear.
That is kind of a fun game, though, I'm realizing: just scrolling through the
list of winners and seeing which ones connect easily and which require some thinking.
I'll also argue against myself, anyway, and say that a lot of the things I'm thinking of have windows of relevance, IE: at least a span of a few years where some film addressing the issue would qualify. And in some cases, that window can be quite large indeed:
Crash was 2004 and
Green Book was 2018. And if another film about race relations and/or reconciliation comes along in 10 years it'll probably still feel relevant then.