Really, just one?
Get Fuzzy by Darby Conley
Monty doesn't quite count, the gag is in the silent panel.
In fact, a good way to ruin the gag would be to listen to me too much and put some words in the penultimate panel. As in, "Monty, your hat does not look like what we expect a hat to look like."
I'm not as dogmatic as some may think.