Synonyms to first class

best, first-chop, first-rate, greatest, highest, maximal, maximum, most, superlative, supreme, tip-top, top, top-drawer, top-hole, top-notch, topflight, topmost, topping, tops, uppermost, utmost, pukka, authentic, bona fide, fair, genuine, good, honorable, indubitable, out-and-out, proper, questionless, real, reliable, right, simon-pure, sure-enough, thorough, true, well done