Oxford English Dictionary
NonPareil
A person or thing having no equal; something unique.
1593 "Evermore maist thou be canonized as the Nonparreille of impious epistlers." Thomas Nashe, Four Letters of Confuted
1596 "You accompt your selfe the Non parel of knowledge." Broughton's Letter.
1601 "Thou you were crown'd the non-pareil of beauty." William Shakespeare, Twelfth Night, 1.5.273.