You have excellent taste (in games and youtubers)! A ton of my favorites of all time are on this list (especially Citizen Sleeper, which hit me in ways that I didn't expect at all). As someone similar:
Exo One: A chill game about rolling an alien space ship through insanely pretty worlds.
Dr. Langeskov, The Tiger, and The Terribly Cursed Emerald: A Whirlwind Heist: A free game a lot like The Stanley Parable, by the same developer.
Cultist Simulator: Completely defies description. A masterfully-written Lovecraftian survival exploration game, but it's made of cards.
Torment: Tides of Numenaria: A great top-down RPG with a unique sci-fantasy universe and de-emphasized combat.
Forager: The methadone to Factorio's heroin.
Black Book: Like Slay the Spire, but story-driven and based on Russian Folklore and history in the transition to industrialization.
Scorn: If H. R. Giger had been the art director on Amnesia, it would have looked like this.
Inscryption: Another incredible horror game with cards as the core mechanic. More great exploration and plenty of "what the fuck" to go around.
Uplink: On the older side, but holds up. A great light hacking game with solid mechanics and not too much excess complexity.
Jazzpunk: Probably the hardest I've laughed from a game since Portal 2.
The Last Door: A 2D point and click adventure with excellent music and atmosphere.
Primordia: A dark point and click about a world populated by robots. Has stuck with me for a long time, mostly because of the jaw-dropping pixel art and voice acting.
Darkside Detective: A point-and-click about investigating the supernatural. Absolutely hilarious.
The Old City: A dark and surreal walking simulator that stands on an incredible soundtrack.
Evergarden: A Chill match-3 puzzle in a soothing garden.
Astroneer: No Man's Sky-esque, but focused on base building and engineering in a finite solar system.
Slime Rancher: The Chao garden, but a full game. A large world to explore with a diverse array of cute slimes to ranch.
Into the Breach: Not sure if this is too mainstream, but it's a really awesome take on a tactics game. Fight aliens, but think more chess than Xcom.
Ascension: Made by a former MTG pro player who was frustrated that the original was pay-to-win. Imagine MTG's complexity with Dominion's mechanics. The digital version is amazing. The physical version is a bit clunky because the mechanics can get pretty complex.
That got longer than I expected too lol. Thanks for these. I'll definitely check out the ones I don't kno.