Who created the Borg concept?
Looking at Wikipedia it is clear TNG had already started without the Borg as such, but with the idea that a new powerful adversary was needed.
This article suggests a collective effort in realising the Borg by the writers, but in reality it is usually one or two people who are initially responsible for a concept.
Is there a named person (or persons) responsible for the Borg, such as Gene Roddenberry and Leonard Nimoy were for the Vulcans initially or Branon Braga for Species 8472?