This is the best one of these four yet. Any help on the artist would be cool.

I can't seem to find it anymore, but it was someone who had it up on deviantart. Maybe they removed it? It used to be one of the first things I'd find with the Fiends.

Very nicely done. So vibrant & full of energy. Would make a neat t-shirt design too. ^_^

This must be one of the few depictions of them that isn't goofy.