No, unless you compare it to the T-34, the Panther, or even the PzIV Ausf G. The basic Sherman's main advantage was that it was being manufactured in the USofA in the automobile factories and could therefore be turned out in huge numbers. That, and the fact that in Italy and France we had overwhelming air superiority and the Germans were short on fuel. The later variants, such as the British Firefly with the 17 pounder gun, got to a point where they could try to go head to head with the German tanks, but it wasn't really advisable.