egomaniac

plural egomaniacs

1. A person obsessed with their own (supposed) importance.

   He's a raving egomaniac: all he ever talks about is himself and how important he is.

   1 more example

   “Not me,” you think. “No one would ever call me an egomaniac.” Perhaps you've always though of yourself as a pretty balanced person. But for people with ambitions, talents, drives, and potential to fulfill, ego comes with the territory. Precisely what makes us so promising as thinkers, doers, creatives, and entrepreneurs, what drives us to the top of those fields, makes us vulnerable to this darker side of the psyche.

   2016, Ryan Holiday, Ego is the Enemy, page 1