DitchMarner
TheGlitchintheSwitch
Forsberg came up in a similar "winner take all game 7" poll about a year ago. So some digging was done and he feasted early in series, but wasn't actually all that impressive for game 7s.
A few of the guys listed don't really have impressive Game Seven numbers for how good they are/were.
Matthews and Marner obviously aren't great options. Shockingly, Kucherov has never recorded a Game Seven point in his career.