Sorry, forgot to reply to you when I posted my entry.
I haven't played either game, but Breath of the Wild would be cool (can't go wrong with LoZ hahahah). No idea about Celeste though, I've heard it's a good game but didn't read anything about its soundtrack...
Adding some more suggestions: I would love to see The Legend of Heroes: Trails in the Sky the 3rd tabs. I played the first two games of the trilogy and really enjoyed the soundtrack, so I think this one should also be pretty good... Technically, though, it doesn't fit the rules of the contest, because while the worldwide release was in 2017, it was first released in Japan in 2007.
There's also Monster Hunter World, which will be getting its PC release next month. I didn't listen to the OST yet, but I found a 3 hour playlist on YouTube, so I think everyone will be able to find something they like.