An outstanding group of seven people or things:the celebrated pleiad of French poets...
From the constellation we have sketched out, there emerges an inspirational (although this a subjective preference) pleiad of authors, who in the last five years or so have produced a range of suggestive and effective literary works.
The Alexandrian Pleiad is the name given to a group of seven Alexandrian poets and tragedians in the 3rd century B.C.