Has Ken Norton no chance against powerful punchers like George Foreman, Earnie Shavers and Gerry Cooney?

If I were Norton's trainer, my game plan for Ken would have to box, move around constantly, circling away from their power punches, and to stay the heck off the ropes. Whenever facing a big puncher, I noticed the one thing Norton would always do was find hismelf on the ropes where the big sluggers would tee off on him. His cross arm defense was unique, and it would have been even more effective had he practiced more movement.