J.K. Simmons

voiced Mantis in Justice League Unlimited

History: During the Civil War on Apokolips, Mantis went on a rampage on Metropolis in an attempt to take over the world. He can fly, possesses superhuman strength and the ability to absorb any form of energy and canalize it against his adversary. Mantis was thwarted by Captain Atom and Superman, who sent him back to Apokolips.

Mantis was then seen fighting on the side of Virman Vundabar and Kanto, against Granny Goodness’s Female Furies.
played Assistant Police Chief Will Pope in The Closer

While a fair and extremely good officer and politician of sorts, Chief Pope is a bit of a fly in the ointment---after all, not only is he the reason that Taylor hates Brenda (because she got he job he wanted), but he was, at one time, Brenda's lover.

While their relationship since she joined the PHD has been nothing if not professional and friendly, Pope's impending divorce may prove to be a problem for Brenda and Fritz, who doesn't trust Pope's motives as far as he can throw him.
voiced J. Jonah Jameson in Marvel's Ultimate Spider-Man vs. the Sinister 6

Jameson is the CEO of The Daily Bugle Communications and loudly pronounces Spider-Man be arrested for his vigilante actions.