Tom Kane

Tom Kane provided the voice of Commissioner Gordon and Mayor Quincy Sharp in Batman: Arkham Asylum but voices Quincy Sharp again in Batman: Arkham City, while David Kaye replaces him role as Commissioner Gordon

Also in Batman: Arkham Asylum, he is uncredited for voicing Louie Green and credited for voicing the Spirit of Arkham/Amadeus Arkham.

Trivia

 * Also known for his work in the Marvel Comics, he voiced mostly villians than heroes, but in the DC Comics, he voiced mostly heroes than villains.