Remarkably, this series by Stopko doesn't even register on this list (cut-off: .930 sv%): https://vhlforum.com/topic/35246-greatest-goaltending-performances-in-single-playoff-series/
It's the 7-2 game which lets him down, despite 66 saves. So to record this achievement somewhere, I should note that his 277 saves against Seattle are higher than anyone else on that list.
He does now have the best wildcard round performance.