Funnily enough, I just use my old Stadia controller. Works perfectly with wired or wireless (in order to utilize Bluetooth, you need to use Google’s tool to “unlock” the Bluetooth mode on it - you only need to do this once), and I can’t say I’ve ever had a game not work with it. I think it just emulates Xinput/an Xbox controller under the hood?
Before that however, I just used an Xbox One controller (particularly, the “Xbox One S” ones that have native Bluetooth support, but my non-S one worked fine over both wired and with the addon dongle that you can purchase) which also always worked out for me. I think I still prefer the Stadia controller for how it feels in the hand, and the fact that it uses USB-C however.
At some point I would like to pickup a GuliKit KK3 Max controller since it seems quite intriguing, however I can’t really justify the price point when my Stadia controller works just fine for me.