Fat-and-jolly-wise, I must admit that two of the Santas are amazingly svelte, especially the Santa-on-a-diet of 1912's "In the Christmas Glow" (third image down). And just exactly what is he stepping out of? A secret passage?? "Hey, Santa, we built this special entrance so you wouldn't have to fry your seat in the fire." Great way to avoid a--no pun intended--Santa suit.
The final Santa, from 1914, is leaner than normal, too, but not overly. Somehow, his weird get-up has me thinking of Vegas-era Elvis. If Elvis had a long white weird and carried dolls.