Fin Fang Foom by Roger Langridge and Laura Martin. For more sketches by Roger, go here for a Sandman/Muppets mashup, and here for a Doctor Who/Muppets mashup. He also has original art from How Fin Fang Foom Saved Christmas like this:
on sale here. And finally, a few desktop wallpapers here. Via.
*Previously: Monstrous Big Bird.
*Buy Fin Fang Foom toys at eBay.