Iced Earth is a good power metal band (much like Sabaton). Their cover art is pretty awesome, without much coherency. Once again, great for working out G.
This is pretty good I guess... There are more stars, you "just can't see them." All o' dis' is turning out well. My next plan is to add an arm of the Galaxy in the background.
Red fang is a great metal band. They are inexorably free-form and quite optimal for exercise. They have a really good song about beer zombies, it is reel gud.
This is my project currently. Oddly enough, this didn't actually come from a picture, it was just a sketch that turned into my project. I am pretty sure it meets all set parameters.