quintessential

quintessential
    adj 1: representing the perfect example of a class or quality
    

Quintessential \Quin`tes*sen"tial\, a.
   Of the nature of a quintessence; purest; most characteristic.
   "Quintessential extract of mediocrity." --G. Eliot.
   [1913 Webster] Quintet
    

86 Moby Thesaurus words for "quintessential":
      appropriate, archetypal, archetypical, best, bottom, champion,
      characteristic, choice, classic, classical, consummate, developed,
      distinctive, distinguished, distinguishing, elect, elite,
      essential, essentiality, exemplary, expert, finished, for the best,
      fully developed, greatest, handpicked, ideal, idiocratic,
      idiosyncratic, in character, intrinsic, marked, marrow, masterful,
      masterly, matchless, mature, matured, model, natural, naturalistic,
      normal, optimal, optimum, paramount, peculiar, peerless, perfected,
      picked, pith, polished, prime, prize, proficient, proper,
      prototypal, pure, quintessence, realistic, refined, regular,
      representative, ripe, ripened, sample, select, single, singular,
      soul, stuff, substance, supreme, surpassing, true to form,
      true to type, typal, typic, typical, unique, unmatchable,
      unmatched, unparalleled, unsurpassed, usual, very best,
      virtuality