I've heard alot of good things about The Ghost Of Tsushima. I've never played it myself though.
If you enjoy games like fallout, I'd really recommend The Outer Worlds! I've played about 20 hours myself, and I love it so far.
The Legend Of Zelda: Breath of The Wild is also a amazing open world game; a bit rough at the start because of the weapon breaking mechanic, but once you get settled in the game, that becomes less of an issue. I'd HIGHLY recommend it, if you have a switch to play it on.
Horizon Zero Dawn is also very fun and unique, and you can get it for pretty cheap now since it's been out for awhile. Still holds up though imo.
And if you're into gacha/anime games, Genshin Impact is really fun too. The openworld is really pretty, and it's filled with collectables and enemies to kill, challenges to complete, and quests. At a certain level you can also play co-op with friends! It's very fun, and I'd recommend giving it a shot even if it's not really your thing. It's free, so you won't really be losing much by trying it out for an hour or two.