I don't see anyone beating that Chad K/Jondix back, but I'll submit one of my skulls for the fun of it. I like the themed contests, at the very least they can serve as a good source of inspiration for people looking to get a certain thing tattooed.
Anyways, here's my skull from Steve Byrne at ROA from a few years ago. Don't really have a healed photo, but found one that kinda works. It's loosely based off of a anti-bolshevik German propaganda poster I saw at the Harry Ransom center in Austin while I was in Austin earlier that day.