I set out to measure the top goaltenders of each decade using a simple measure that adjusts for different environments of the years played.
The measure used is Saves Above League Average which is a measure of how many pucks a goalie stops relative to league average from that season. It is computed as:
I compiled the top 10 and bottom 10 for the cumulative totals for the decades and the most extreme single-season marks.
If you want to test yourself before looking at the results, I made them into Sporcle quizzes: 2000s / 1990s / 1980s