1: original Saturn pad (non-US ver, obviously)
2: Super Famicom "ASCI Pad". This thing is the SHIIIIIZ. Basically identical the OEM pad but with easier to hit shoulder buttons (and turbo)

3: NiGHTS/3D/Analog Saturn pad (white)
4: AES stick (not the best stick ever made, but certainly the best pack-in stick ever made)
5: Gamecube
Runners up:
To be honest, the XBox "Controller S" and 360 pads are pretty good as long as you NEVER have to use the digital pad on them.
The Dual Shock series is pretty good as well except for the actual overall shape (the components are nice).
The PC Engine series is great.
Worst: 3DO, Dreamcast, and basically every single f*cking thing Atari ever released. God they suck.