Arakasi said:
Here's a handy chart (which is missing Wii U controller)
It's also missing the Saturn controller, though that's pretty much the same as the 6-button Genesis controller (listed as Sega CD), exchanging one option button for two shoulder buttons.
Also, the Saturn controller is my pick. Because it complimented the strengths of the console it came with so extremely well.
The Saturn was a 2d powerhouse, and as far as 2d gaming goes, IMO you couldn't ask for a finer controller. It inherited the awesome d-pad of its Genesis predecessors[footnote]I don't know why Sega abandoned that for the Nintendo-style cross d-pad on the Dreamcast. I think it's awful.[/footnote]. From the 6-button model it inherited its comfortable shape, not too big and not too small, and those 6 face buttons that make it more analogous to the button lay-out of an arcade cabinet. An actual arcade stick is still better for fighting and other arcade-style games, but lacking one of those, the Saturn controller will not let you down.