Most of mine have already been mentioned; KSP, Rimworld, Stellaris.
So I’ll add one of my all time favourite games and say XCom and XCOM 2. I’ve sunk hundreds of hours into xcom 2 with various mods.
Close second is Crusader Kings 2, and close third after that is Empire Total War.
And of course CIV. It’s not a proper list without CIV.
As long as your web browser can access udev for the controller, just go to Xbox.com/play or something like that. I’m away from my desktop, but I think that’s the address. I’ve done it a few times now.
I had switched to HeliBoard in order to de-Google as much as possible. I’m not militant about it, but if there’s an alternative I’ll take it.
Decided to try out FUTO because I felt like I was missing swipe typing. And it’s good. But for me it’s just too much. It turns out I didn’t really miss swipe typing, and (possibly just a me issue) that extra feature was making FUTO much less responsive than Heliboard. So back I went.
I guess for me, simple and fast is more important than replicating my old Gboard experience. But each person is different.