Brock Peters
Brock Peters or Brock G. Peters (born George Fisher; July 2, 1927 – August 23, 2005) was an American actor, best known for playing the role of Tom Robinson in the 1962 film To Kill a Mockingbird and for his role as "Crown" in the 1959 film version of Porgy and Bess. In later years, he gained recognition among Star Trek fans for his portrayals of Fleet Admiral Cartwright in two of the Star Trek feature films and Joseph Sisko, father of Benjamin Sisko, in Star Trek: Deep Space Nine. He was also notable for his role as Hatcher in Soylent Green.
Known for
To Kill a Mockingbird 
Star Trek IV: The Voyage Home 
Star Trek VI: The Undiscovered Country 
Soylent Green 
The Wild Thornberrys 
The Pawnbroker 
Major Dundee 
Carmen Jones 
The Incident 
Ace High 
Two-Minute Warning 
Alligator II: The Mutation 
The L-Shaped Room 
Heavens Above! 
Slaughter's Big Rip-Off 
Black Girl