Stephen Keener (June 17, 1940 - March 30, 2022) was a classically trained actor who provided the voice of various characters in the later seasons of The Transformers. He seemed to have dropped off the face of the earth after 1987 until his return to our planet in 2018.
Shortly after the cartoon ended, Keener retired from acting and started a construction company, and resided in southern Missouri. He passed away on March 30, 2022.