Has to be the Panthers. SCF appearance last year. Core is back and got big additions at the deadline. Path out of the East much much much cleaner than out of the West.
That said, it's a wide open field. Edmonton could get hot and Skinner could be OK enough. Colorado is a sleeping giant that apparently might have Landeskog back. Dallas somehow forgotten. Defending champs added a 1C and top pair d at the deadline. Carolina has been around enough that they just need a break to break through. And ofc NYR is in there too.
Then you've got teams who probably aren't "contenders" outright but who could easily make a run: Vancouver, Boston, Toronto, and Winnipeg for me in this category.
NYR are maybe fortunate that the Metro looks like the weakest division this year. But part of that is NYR not exactly looking like the beast of the east.