primal

distinguished, eminent, illustrious, noble, notable, noteworthy, outstanding, prestigious, signal, star, stellar, superior

high-level, senior, top

important, influential, major, mighty, momentous, significant

incomparable, matchless, unequaled (or unequalled), unparalleled, unsurpassed

celebrated, famed, famous, renowned

budding, embryonic, germinal, infant

aged, age-old, antediluvian, antiquated, antique, dateless, hoary, old, prehistoric (also prehistorical)

obsolete, outmoded, out-of-date, passé