Thornton isn't generational. That term should be reserved for the absolute best of the best who transcended the sport. I think
@Voight's list is pretty good.
Jumbo absolutely was one of the best players in the game for a stretch from 2005-2009 ish. Back to back 90 assist seasons, won a Hart and Art Ross, led the league in assists 3 straight years and finished 2nd and 5th the two years after that.
I think Jumbo is underappreciated in some ways. He put up 82 points in 82 games at the age of 36 with 21 points in 24 playoff games in the Sharks run to the final in 2016. Like, that's a damn good season for a 26 year old let alone a guy who's 36. In 2018-2019 he put up 50 points in 73 games at the age of 39 playing on the third line with Marcus ****** Sorensen after tearing the ACL of both knees in back to back years.