6. Hans Landa
Speaking of houseguests to terrify the poor Jewish partygoers, Hans Landa is a name that truly comes to mind. A Colonel of the SS and nicknamed The Jew Hunter, Hans has a lot going for him in terms of his characteristics - he is calm, highly linguistic, his manners are impeccable and his compliments are from the heart - but it is ultimately his background that makes everyone that comes into contact with him uneasy. That kind of atmosphere is a definite party killer. If you were to take Hans along with you he could fool you into a false sense that everything is fine as he compliments your hosts on their hospitality and their food and drink, but soon enough you may be ducking under the table to hide from the fact your chosen companion is a complete fascist who is obsessed with calmly, quietly disposing of certain members of the party while freaking everyone else out with outrageously offensive metaphors.