I remember we bought a third-party controller as an extra for our SNES back when that was a current system, but don’t remember the brand. We got it because it was less expensive than an official controller, but it also quickly became noticeably less reliable.
Retro-bit, Retro Fighters, and Krikzz are a few more manufacturers I can think of making controllers with original ports.
In particular, Retro-bit’s Saturn Pro pad is…interesting, let’s say. I have also used Retro Fighters Striker Dreamcast pads - they’re quite nice.
In yonder days, a few companies like ASCII and Hori come up a lot for reliable stuff.
I remember we bought a third-party controller as an extra for our SNES back when that was a current system, but don’t remember the brand. We got it because it was less expensive than an official controller, but it also quickly became noticeably less reliable.