Japanese

ある場所、あるいは集団においてトップクラスであるさま _(takkur)
― 彼は全国でも有数のバカだ; 彼は我が校でも有数の成績で卒業した

English

being first class in the place or the group to which the one belongs _(takkur)
― he is a first class fool all over the country; he graduated from our school with an excellent record

_{takkur (2016-04-22 11:19:15)}

(TK 22 Apr, 2016) "place or group"(noun) + "でも"(postposition) + "有数/指折り/屈指" + "の/な" + noun; this tends to be followed by "の", but "な" is also OK.