top dog, A per se, ace, boss, champ, champion, chief, commander, conquering hero, conqueror, conquistador, dean, defeater, doyen, doyenne, easy winner...
This is <span class="searchmatch">Moby</span> <span class="searchmatch">Thesaurus</span> <span class="searchmatch">II</span>, a public domain <span class="searchmatch">thesaurus</span>....