They didn't start doing 16-team playoff tournaments until 1979-80, so it wouldn't really be fair to compare those totals since those names you mentioned weren't playing enough playoff games in their primes to reach those numbers.
I think something that gets conveniently ignored a lot around here, especially when trying to widen the gap between Gretz and Lemieux, is the fact that when the Soviets and Czechslovakians were dominating international tournaments the NHL wasn't truly "best on best" until the Iron Curtain fell. Then we started seeing an influx of Russian and Czecho-Slovak players, which made the league far more competitive than it had ever been.
Also, the NHL era during the existence of the WHA should be considered a weaker league because you had a lot of talent spread across both leagues, even if the NHL was superior, the WHA was not a minor league. You had elite players like Hull (arguably a top 5 player in the NHL when he joined the WHA), Cheevers, and even prime Bernie Parent all playing at least a season in the WHA.
Then we go back to the Original Six days, where who knows how many potentially legendary players were denied opportunities! Johnny Bower didn't even become a starter until what, his mid-30s? On the other hand, some people like to argue that each O6 Team was a super-squad made up of the best players of the era. Either could be true.
