I really don't think you can call the 360 controller "ideal" for platformers with its unusable d-pad. Or do people actually use sticks for platformers these days?

Since the Wii U's not selling so well, most people probably don't know about it, but I think the Wii U Pro Controller is probably the best modern controller for classic gaming. It's basically a 360 controller with Nintendo quality. And people have already written drivers for Windows and OS X, and support was added to Linux in 3.11.