I am trying to describe this character from a book and I want to emphasize the fact that this character always wants/needs to be the best in his class. My first thought was to use the word high achiever, but I want a word with a more negative connotation to it. I'm thinking the word should point towards the character's almost manipulative behavior, in that he is willing to do foolish acts in attempt to appear as the strongest and best in his class. Another good way of describing this trait would be the term "fragile masculinity", but this has a political undertone, and the real issue doesn't involve any argument on gender roles but rather just the character flaw of needing to be the "alpha male" per se.
To sum it up I am looking for a word that describes the character flaw of always needing (or at least appearing) to be the best/strongest/most powerful person in a group.
Sorry about the confusing explanation, and thank you for any help and suggestions given!