What jumps out to me is how much the Hall of Fame seems to prioritize players who contributed significantly to a single franchise.
As I showed
in this post, almost every player who's ever scored 1,000+ points for a single franchise is (or likely will be) in the Hall.
For the names on this list - it really stands out that most of these players jumped around a lot. (So did Pierre Turgeon, who had to wait many years despite scoring 1,300+ points). Of the 18 players you listed, just four of them spent all (or almost all) of their career with a single franchise - Elias, Larmer, Propp, and Taylor.
On the assumption that Elias gets into the Hall, that leaves us with three players. Marchand is likely going to match the career totals for Larmer, Propp, and Taylor - playing in a lower scoring era. He won a Stanley Cup (Propp and Taylor didn't). He has four years in the top ten in Hart voting (more than these three players combined). He was a first-team year-end all-star twice (none of these three did that, even once). And he was a top ten scorer four times (matching these other three players combined).
My educated guess is, assuming Marchand reaches 1,000 points, he'll get into the Hall. The committee might make him wait several years due to his reputation, but I'd be surprised if he isn't inducted within ten years of being eligible. (Someone can call out this post in say 2040 if I'm wrong).