I'm wondering if a wireless Xbox controller would work. It's what I use with Apple TV without issue. Button layout is close enough (runs to living room to compare Xbox controller to Switch Pro...), in fact they're basically identical.
OTOH, I haven't tried the Switch Pro controller with anything else but a Switch, so maybe it can be made to work? (EDIT: just tried it: my Mac connects to the Switch Pro via BT, haven't actually tried it, 'cuz damned work is in the way.)
Thanks for the correction. Of course as someone without an N64, I went with "sure, that Dvorak keyboard will be recognized!" without checking if it's actually fit for purpose.
I use the N64 controller with my PC, it's available for purchase by anyone who subscribes to NSO. It connects via bluetooth (the USB connection is for charging only).