I figured I should answer my own question too

Got 2 splitter devices (one is a roboshift, the other looks like a kitbash). Each port has a mouse plugged in (one is an A1200 style mouse, that I love to death, the other is a tank mouse) and a joystick or pad.
The ones I use primarily:
A new comp pro (nice, accurate, but only primary buttons)
A wico bat handle (annoyingly does not work as a two button stick(
CD32 comp pro pad. (excellent but a bit worn out, so you have to push the buttons pretty hard)
Gravis gamepad (amazingly awesome)