Thought of making a list akin to the heroes list...opine Villians can be in many forms.
1) I think they would be a few 'deadly sins" which are more or less related to the ROOT of Villainy : Gluttony, Greed, Wrath ,Envy and Pride. Most criminals have an excess of one or the other or more.
2) Then there are the people behind loss of money, jobs and livelihood for thousands - Eg. Enron, WorldCom
3) The carelessness behind man made tragedies like - the Chernobyl, Bhopal gas tragedy.
4) Polticians who are causing wars just to get supremacy over natural resources like oil, water(rivers)
5) Dictators like Idi Amin, Hitler, Musharraf....etc..
6) Corporations that do not care about the environment. Industrial waste being dumped in rivers, not planting trees and not supporting green living..
..well the list is long and only brings up negative emotions...