Bruce Timm
Bruce Walter Timm (born on February 5, 1961) is an American character designer, animator and producer. He is also a writer and artist working in comics, and is known for his contributions building the modern DC Comics animated franchise, the DC animated universe.
Known for
Batman: The Killing Joke 
Batman: The Animated Series 
Batman: Mask of the Phantasm 
Batman: Gotham by Gaslight 
Batman: Under the Red Hood 
Superman: Red Son 
Justice League 
Batman: The Dark Knight Returns, Part 1 
Batman and Harley Quinn 
Batman: The Dark Knight Returns, Part 2 
Justice League: Gods and Monsters 
Batman Beyond 
Batman: Year One 
Justice League: Doom 
Justice League vs the Fatal Five 
Batman: Gotham Knight 
Superman/Batman: Apocalypse 
Justice League: Crisis on Two Earths 
Batman Beyond: Return of the Joker 
Superman/Batman: Public Enemies 
Superman: Doomsday 
The New Batman Adventures 
Batman: Soul of the Dragon 
Justice League: The New Frontier 
Wonder Woman 
Batman: Caped Crusader 
Green Lantern: First Flight 
All-Star Superman 
Superman vs. The Elite 
Green Lantern: Emerald Knights 
Green Lantern: The Animated Series 
Superman/Shazam!: The Return of Black Adam 
Green Arrow 
Catwoman 
DC Showcase: The Spectre 
DC Showcase: Jonah Hex 
Sgt. Rock 
The Phantom Stranger 
Heart of Batman 
Batman: The Dark Knight Returns