Synonyms of leading

1 Syllable
top, head, main, arch, front, key, chief, best, first, wk, keyer, star
2 Syllables
ahead, urgent, big-time, topmost, besting, archer, premier, topper, greatest, fronter, bigshot, right-hand, champion, big-name, big-gun, big-wheel, hot-dog, vanward, big-shot, stellar, rager, banners, central, famous, loftiest, faddish, mainer, winning, chiefest, well-known, centric, greater, vanguard, needful, highest, banner, headmost, ruling, major, blue-chip, righthand, senior, celeb, namest, noted, axial, forward, hotdog, namer, four-star, high-up
3 Syllables
advanced, advance, centroidal, germinal, influential, big-league, principals, paramount, called-for, popular, high-ranking, well-thought-of, managing, initial, governing, redoubted, preceding, cardinal, preexistent, prevenient, well-liked, prodromal, husbanding, principal, capitals, supreme, crowd-pleasing, run-after, essential, sought-after, piloting, primary, dominant, outstanding, preeminent, notorious, capital, mainline, exalted, bigtime, prominent, foremost, top-level, high-level
4 Syllables
top-priority, conducive, dominating, highest-ranking, unsurpassed, inceptive, aforeknown, forerunning, promotive, overweighing, well-received, predominant, second-to-none, inaugural
5 Syllables
much-publicized, super-eminent, above-named, initiatory, overbalancing, supereminent
6 Syllables
aforementioned, above-mentioned, abovementioned