nonesuch

在古典音乐领域，这位小提琴家被视为无匹敌之人。

In classical music, this violinist is regarded as a ___nonesuch.

在古董收藏界，这位鉴定师被视为无可匹敌的人。

Among antique collectors, this appraiser is regarded as a ___nonesuch.

那位棋手在同时代棋手中因其残局技巧而成为无可匹敌的人。

That chess player is a ___nonesuch among contemporaries for his endgame skill.