matchless, nonpareil, one(a), one and only(a), peerless, unmatched, unmatchable, unrivaled, unrivalled(adj)

eminent beyond or above comparison

"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"

unrivaled(Adjective)

Beyond compare, far surpassing any other, unparalleled, without rival.

Unrivaled(adj)

having no rival; without a competitor; peerless