Ive been off here too long, I gotta give this a go:

1: St Lucifer AKA Satan - lord of Hell and all things evil, with the ability to twist the minds of all beings to evil

2: A tanto wielding Goth: Based on me really, 6ft 4, Size 14 feet, black clothes, leather fingerless gloves and an insatiable appetite for sword slaughtering

3: Stewie Griffin (Family Guy): a 1 year old boy with a fantastically evil English accent and a brain to match, and who will stop at nothing less than world domination through use of his EVIL devices

4: The Dark Magician (Yu-gi-Oh card monster): A master of the black arts, its power can overcome any pure psysical attacks and throw them back with infinatly more devastating effect.

5: The Grim Reaper AKA Death itself: No explination needed, one touch and youll die

6: Raymundo (Xaiolin Showdown): the highest ranked of the monks (Shoku warrior), he commands the element of the air and wind, and has control over all the Shen-gong Wu, a collection of mystic power items each with their own speacial power (list and abilities up later).

7: Slipknot (Heavy Metal Band): The 9 scariest men in Metal-dom come to fight, each with their own unique mask and instrument, and can reduce a building to dust with one rendition of Duality

8: Bender (Futurama): You know him, ya love him, and you can bite his shiny metal a$$! Can bend even the unbendabke girders, and burps and farts searing hot flame to melt away enimies

They may not be as random as some, but I like them, so thats my choices