For those seeking just the right evil-clown band, The Onion A.V. Club offers this guide. Dope are never seen without clown make-up.
Few bands are as publicly interested in synthesizing themes of clowndom and evil.
Each member wears a homemade mask, but only one is clown-related. Slipknot's lyrics deal more with depression and violence. One member wears a clown mask, but the clowning itself seems incidental. Twiztid's make-up, though not specifically clownish, owes a lot to its mentors in Insane Clown Posse. Plenty of evil, precious little clowning.