My Steam library basically only consists of Witcher 3 and Spiritfarer. I also was gifted a Humble Bundle game for Batman Arkham Knight.
I’m debating on getting Elden Ring and Cyberpunk (both without DLC).
Marvel’s Spider-Man and FF7 Interograde also look like a good value right now for 40 bucks total.
If you must get something from Steam, I’d get something with great time by price ratio, like Terraria, Starbound and Stardew Valley. Or also JRPGs like Final Fantasy XII.
But from your picks, Elden Ring is the one I’d go for, mostly because it’s the one that picks my attention the most.
Otherwise, maybe you’d want to follow giveaway communities and alert profiles, e.g. here on the fediverse?