Hard to believe, but the successor to the Lee, the M4 Sherman, was considered a badass tank in North Africa.
The Germans, already responding to losses in Russia, upgunned their MkIV, and developed their heavy tanks, taking over tank superiority in Europe, where the allies continued to use the Sherman. However, in some ways they inherited the faults of the French Char B1: fuel thirst, mobility issues, unreliability.
And then, nothing is static in warfare. The allies where coming out with their Pershings, Centurions, and JSIII.
While the Pershing, Centurion, and the IS-III were the ultimate in heavy tank designs by the allies, they saw very little service by the wars end. The only successful counter to the Tiger was the Soviet IS-2 which entered production in Nov 1943.