Can you name this bird? I saw two birds like this hanging with Canadian geese for one day on Lake Placid. I did not see them after that.

It is mostly white with a black or dark grey bill. It has a stripe going from the bill to the back of it’s head that starts out dark grey then fades to a lighter grey. It has light grey on back feathers.
I have had a few suggestions: young snow geese, white morph Ross’s goose, and a hybrid. What do you think?