Although he never held office, he was widely regarded as the gray eminence behind the administration's major decisions.

Though he never sought the spotlight, he became the grey eminence behind every major policy decision.

Although rarely seen in public, the senator's eminence grise shaped every major policy behind the scenes.

During the osteology lecture, the professor pointed to the frontal eminence on the model and explained its developmental significance.

The CEO relied heavily on a group of eminence grises who shaped company policy from the shadows.