Sentinel Prime (G1)

Sentinel Prime was an Autobot in Generation 1 continuity.

Well, shoot, who wants the Matrix?

Sentinel Prime was the Autobot leader until Megatron killed him. He was last in a long string of unsuccessful Primes, followed by the legendary leadership of Optimus Prime.

Fiction

Marvel Comics Continuity

Sentinel Prime is mentioned frequently in the recitation of Primes before Optimus, but little or nothing is known of him.

The retelling of Unicron's origin in the UK comics included a brief glimpse of a dying Template:Tooltip passing the Matrix of Leadership to Optimus Prime.

Dreamwave Comics Continuity

"Morley was dead to begin with..."

Toys

No toy of any version of Sentinel Prime has ever been produced.

From Teletraan I: The Transformers Wiki, a Wikia wiki.