Ooh, very tough question. I've played both Celeste, and Hollow knight. So I cant say anything for the other two games.
Celeste and Hollow Knight are both platforming games, so that was something I was interested in. And both also have deep morals to learn and stories to enjoy. Celeste basically follows Madeline, who's had some emotional problems in the past as she's trying to climb a mountain. In this mountain, a part of her escapes and becomes a but of a antag.
I loved the background, and the characters in this game. But there were a lot of parts in the game that frustrated me and I got very close to just all-out giving up on the game. I still loved it though.
But don't even get me started on Hollow Knight. LIKE OH My GOD, I am obsessed with Hollow Knight and its beauty! I have almost every piece of merchandise, every plush, every t-shirt, charm, sticker, pins, and all the DLC packs. This game is an absolute masterpiece. I cant say anything without giving off the background and lore behind the game. and I'll be honest, there's been a couple of times where I was so touched with the game, that I just started crying. There's lovable characters like Hornet, our little Ghost, Myla (oml rip Myla you beautiful baby), and of course laughable Zote. Its so beautiful. The art is stunning, the animation is so clean. And if you do end up getting Hollow Knight, then your going to be even more excited because Team Cherry is actually in the works of creating the sequel (or prequel) of Hollow Knight, which is Hollow Knight ; Silksong! Definitely go and watch the Nintendo trailer for that game! I've been so excited about it for months and Ive been watching the trailer almost every day.
Anyway, sorry this is so long. But i'm going to go with my gut and say Hollow Knight. Its beautiful, amazing, and overall just..perfect.