In order of awesomeness
Hori 6 button, it's the GOAT
Avenue 6, a very close second and my go to pads on my setup.
Ave 3, same as above just less buttons, they are good for people with big meaty claws
Standard Turbo/Duo/PE Engine pad, works gets the job done
Finally 1st gen PCE pad with no turbo, use em in a pinch if no other controller is available.