I don't think so. Chief is physically superior to all guardians by being a spartan (unless Bungie forgot to tell us that the traveler gave us more than just space magic abilities) and he has much more combat training, not to mention the best reflexes (because of the genetic modifications) Although they have rechargeable supers and grenades, it means you can't spam throw grenades (unless you go sunsinger) whereas chief can so long as he has them. Besides that, weapons are pretty matched in terms of 1v1 combat.