Oswald Cobblepot (Titans Tomorrow)

In a possible future, The Penguin was a Batman rogue who was killed by Batman.

History
Before Oswald was murdered, Oswald Cobblepot was a wealthy Batman rogue, who went under the alias the Penguin.

Death
Some point, after Dick Grayson retired from the role of Batman and the mantle was passed to Tim Drake, Penguin was killed and buried in Arkham Cemetary, along with other criminals, like Hush, Scarecrow, and Shiva.