Hint: So, have you spotted the 15-Across yet? Maybe try highlighting (preferably in green) the grid entries referenced in that clue.
Hint: The four familiar surnames kinda provide decorations for the 15-Across, don't you think?
Hint: Okay, okay, so it's a rather crude drawing, but it does contain the holiday message I'm heralding.
Hint: I'm still bummed, though, that there were "two ALLs" in the grid.
Hint: Since it's Christmas, and since those surnames happen to belong to four "men", I've decided to accept all variations of the holiday message that contain "to all" and "to all men".