paragon, model, standard, ne plus ultra, exemplar, ideal, Literary nonsuch or nonesuch, Colloq oner, one in a million, Brit one-off:
Annabelle was a nonpareil among the artists of her day.
Advanced English Dictionary
(also none the less) +adverb (written) in spite of this fact Synonym: NEVERTHELESS The book is too long but, nonetheless, informative and entertaining. + The problems are not serious. Nonetheless, we shall need to tackle them soon.