Egotists

Egotists are villains who have excessive importance of themselves and their own life experiences. These characters tend to talk excessively about themselves and have an insatiable desire to be above others. It mainly includes three sub-types: egomaniacs, megalomaniacs and monomaniacs. This category also includes villains who seek attention and/or fame.

Egotists are extremely hard to qualify as nihilists because the very trait of egotism is importance of one’s self or self-esteem, while nihilism is basically one finding life (including their own) meaningless. However, it may not be impossible for an egotist to qualify as a nihilist as long as they don’t value their own existence other than having an extremely huge sense of self-esteem. In fact, most nihilists in fiction are egocentric and petty individuals who believe that since their lives don't matter, no one else's does.