Help me make an absurdly complete nativity scene.

Garden Gnomes.

You’ll want a Mr Hankey.

Manger Babies.

Nah, go with a long and honorable cultural tradition, instead.

Work in an olive as in Olive, the other reindeer.

Dear G-d, yes. How could I have missed it?
I have failed the 'Dope, and again am the Poster Child of Ignorance.

From the OP, with bolding added:

Do Ralphie, Misfit Toys, the Misers, Hannukah Harry, garden gnomes and Olive really fit the criteria?

Yakko, Wakko and Dot Warner

Probably not, but how often do I get the chance to dis Jesus?

Channukah: The Jewish Christmas, where we honor the only Jewish son who lived up t his Mother’s expectations.