supreme
cardinal, chief, crowning, culminating, extreme, final, first, foremost, greatest, head, highest, incomparable, leading, matchless, mother (of all), paramount, peerless, predominant, pre-eminent, prevailing, prime, principal, sovereign, superlative, surpassing, top, ultimate, unsurpassed, utmost
Antonyms
least, least successful, lowest, most inferior, most minor, most subordinate, most trivial, poorest, worst