5. Cannibal Holocaust (1989) - Alan Yates

Alan is the head of a group of documentary makers who went to the Amazon to film cannibal tribes and disappeared into thin air. An anthropology professor goes to the Amazon to find out what happened to them and in the process picks up some film reels. When the reels are watched, what unfurls is a litany of depraved events primarily instigated by Alan, who comes across as a cold hearted bastard who would go to any lengths to secure sensationalist footage. On the film reel, Alan rapes a native girl and torches the natives' huts to get interesting footage for the documentary. My absolute favourite bit in Cannibal Holocaust is when the documentary crew stumble across a native woman who has been impaled on a stake entering her vagina and exiting through the mouth. We see Alan leering at the unfortunate woman - I have never seen such ogling in my life! Then one of the crew reminds him they are filming and he totally composes his face to look solemn and stern and delivers a monologue about how barbaric and brutal the natives are. This bit in the film is pure brilliance and marks Alan as a pervy horror scumbag who finds it easy to get under your skin