I don’t know if it counts as a controller per se, but I’ve been using an MMO mouse with a big number pad for the thumb for quite a few years now. I used to laugh at these things, but once I tried one, I couldn’t go back. Those extra buttons come in handy a lot more often than you might think, and sometimes I wish it had even more.
I have both PS4 and PS5 controllers for use with my PC, and I prefer the PS4 one because it feels more comfortable in my hands.