Synonyms and related words :
careerist, egotist, fortune hunter, grouch, hog, individualist, killjoy, lone wolf, loner, malcontent, monopolist, narcissist, road hog, self-advancer, self-pleaser, self-seeker, self-server, sourpuss, spoilsport, temporizer, timepleaser, timeserver, tufthunter, wet blanket,