I've been devouring so many good recommendations and now I am thirsty for more. So far I have obliterated:
- Hades - The Cult of The Lamb - Disco Elysium - Thimbleweed Park
But I trust people here have many good things to add to the list!
RimWorld - which has been completely optimized for the Deck
https://store.steampowered.com/app/294100/RimWorld/
Factorio - Dev team is currently in process using the knowledge gained from the Switch port to create a fully Deck verified version
Get Xbox Game Pass and play all the controller friendly games there
Most of the uplay subscription games also support controller
You can run most of the games either locally on the deck, streamed from your desktop, or streamed from the internet
I'm scared to even mention it - considering it can be very addictive, but have you checked out Vampire Survivors?
All the games you mentioned are excellent! I find Hollow Knight and Celeste to be perfect handheld games.
I'm a Rocket League addict myself. I heard Hollow Knight is good on it.
Install Exult and play Ultima VII, the greatest RPG of all time!
Platformers play really nicely on the deck, so check out Hollow Knight, Dead Cells, and its ilk.