Well in that case why not a queen of the dead/vampire costume? You just need a long glam dress, very high heels and lots of pale make up with lashings of black eyeliner and dark red lips. Bit of blood coming down the mouth would be good.
A friend of mine donned herself in green paint, slapped on a white dress and blond wig and went as a dead Marolyn Monroe to a party which I always thought was excellent. She won a prize actually.
Stripey jumper, bad make up and some garden forks up your sleeve and you could be Freddy.
I once went as the bride of satan complete with dead boquet of flowers... That was just a long cocktail dress with some funky hair things and I dyed an old curtain red to make a sort of veil thing. Again, lots of black eye make up and dark red lips.