Earle Hyman - Wikipedia
https://en.wikipedia.org/wiki/Earle_Hyman
Earle
Hyman (October 11, 1926 – November 17, 2017) was an American stage,
television, and film actor. Hyman is known for his role on ThunderCats
as the voice of Panthro and various other characters. He also appeared
on The Cosby Show as Cliff's father, Russell Huxtable.