adj

1. eminent beyond or above comparison

e.g. matchless beauty
the team's nonpareil center fielder
she's one girl in a million
the one and only Muhammad Ali
a peerless scholar
infamy unmatched in the Western world
wrote with unmatchable clarity
unrivaled mastery of her art

Synonym: matchlessnonpareilone(a)one and only(a)peerlessunmatchedunrivaledunrivalled