Egotist

(n.) One who speaks much of himself or magnifies his own achievements or affairs.

Thesaurus Entries

Narcissus, braggart, careerist, egocentric, egoist, fortune hunter, hog, individualist, know-it-all, lone wolf, loner, monopolist, narcissist, narcist, no modest violet, road hog, self-advancer, self-pleaser, self-seeker, self-server, smart aleck, swellhead, temporizer, timepleaser, timeserver, tufthunter