You can't be considered one of the greatest goalies ever without playoff success. In that regard Terry Sawchuk definitely earned his praise.
A four time Stanley Cup champ, Sawchuk was never better than in his first championship run with Detroit in the spring of 1952. In round one he shutout Toronto twice and allowed a total of just three goals in four games. In the finals he allowed Montreal only two goals while shutting them out in the final two contests. His goals against average was 0.63 and he had an incredible saves percentage of .977. His record was a perfect 8 wins and 0 losses.
There was no trophy for the playoff MVP back in those days, but Terry Sawchuk certainly would have won it in 1952.