Oxford Dictionary
unequalled
unequalled |ʌnˈiːkw (ə )ld |(US unequaled ) ▶adjective superior to all others in performance or extent: a range of facilities unequalled in London | trout of unequalled quality.
Oxford Thesaurus
unequalled
unequalled adjective an unequalled record of five World Cup victories: unbeaten, unmatched, matchless, unrivalled, without equal, unsurpassed, unparalleled, without parallel, peerless, incomparable, beyond compare, inimitable, second to none, record, best ever, nonpareil, unique; French par excellence.