nonpareil

model of excellence or perfection of a kind; one having no equal

colored beads of sugar used as a topping on e.g. candies and cookies

a flat disk of chocolate covered with beads of colored sugar

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"