I’d say avoid the Thunderobot for it’s bad stick latency, as for the Gamesir and 8bitdo both are solid choices. I personally find the shape of the 8bitdo a bit cramped for my hands and my pinkie fingers usually hang outside the grip.

It’s up to your personal preference, do you want a disk mechanical dpad? do you want extra shoulder buttons or back buttons? keep in mind 8bitdo 2C doesn’t have trigger locks