Hanoi Jane perhaps? I for one am waiting for my opportunity.
I'd say Michael Moore.
Not only is he a hardcore Socialist, a crockumentarian who distorts the truth and at times blatantly lies in pretty much everything he writes or films, and simply an obnoxious douchebag, he's also a genuinely bad, cruel, treacherous, self- serving, hypocritical person behind the scenes.
I did some research on him once to refute a movie of his that would be shown in one of my college classes, and he truly is even worse than most people realize he is. He's slandered and betrayed a lot of good people who trusted him in order to advance himself.
Fortunately, God has for the last few years been giving Moore what he deserves for his life of evil, between his last few crockumentaries bombing miserably, his Broadway show flopping, and his ex- wife REALLY taking him to the cleaners in their divorce.
Still, I'd imagine when that repulsive, washed up blob finally keels over from a cholesterol-induced heart attack and shuffles off to his double- wide reserved seat in Hell, there will undoubtedly be a long line of people eager to decorate his grave in this way, especially those whom he has hurt in order to boost his own ego and bank account.