The Power Player controllers come packed in with the Super Joy Famiclone systems. Over the years I have found plenty of these laying around thrift stores and I would dare say they are the most common Famiclone controllers out there. With a pseudo Genesis shape they are as comfortable as any Genesis controller, although significantly lighter and more bulky. Again the A and B are backwards, as the C button functions as Select, since there is only a stand alone start button. Again these seem universally compatible, so if you need Famiclone controllers in a pinch, these are most likely to be easier to find and ready to go.
The Powerstation controllers are, again, based on the Playstation, even Powerstation is kind of a play on the former's console name. If you're familiar with the Playstation controller, you're pretty much familiar with this one too! Comfortable, A and B are in correct alignment with turbo buttons just above them, diagonally left. This controller even features shoulder buttons being: L1 is B, R1 is A and pressing both L2 and R2 is the equivalent of start. The plastic, although still the cheap melty kind, feels good and solid in your hands, topped of with a good cable length. Seemingly universal as well.