I personally love Halo and the RC's but I think Chief would win against all 4 pretty easily. Now disregarding armor and equipment the Commandos would not win even if they ganged up on Chief considering the Commandos are just regular humans with more training than your average CT. Chief on the other hand has years and years of augmentations altering almost every aspect of his body. Now giving each soldier their armor and equipment makes them a formidable foe, there isn't much to compare the armor systems of a Spartan II and Clone Commando's armor, I'm giving the edge to Chief considering there is just so many examples of how his armor works and what it can withstand, hell the man fell out of Earth's orbit and the armor didn't break. Given the insane of information about what an average Spartan II can do when compare to a CC it's clearly evident that the Spartan is superior to the CC. Now that doesn't mean they can't beat Chief, they would have to be incredibility careful considering they're fighting a 1 ton monster whose seen years of combat against a crazy Alien empire encompassing different species,a parasitic race that devours practically everything in it's path to breed and an ancient advanced race of super beings who could make planets.