Wally Wingert
Wallace Eugene Wingert (born August 16, 1961) is an American actor, voice actor, singer, performer and former radio personality. He is best known as the announcer for the second incarnation of  The Tonight Show with Jay Leno, and the current voice of Jon Arbuckle in The Garfield Show. He is also known for his role as one of the Almighty Tallest in Invader Zim (along with Kevin McDonald), Ant-Man/Giant-Man from The Avengers: Earth's Mightiest Heroes, the Riddler from the Batman: Arkham video game series, and Renji Abarai from Bleach.