Peter Weller

Actor (Paxton and Admiral Marcus) — Enterprise

American actor and director (born 1947), best known as RoboCop, who played the xenophobic John Frederick Paxton in Star Trek: Enterprise and Admiral Alexander Marcus in Star Trek Into Darkness.

Peter Weller (born 1947) is an American actor and director famous for the title role in RoboCop and for The Adventures of Buckaroo Banzai Across the 8th Dimension.
In the fourth season of Star Trek: Enterprise he guest-starred in the two-part story Demons and Terra Prime as John Frederick Paxton, leader of the isolationist Terra Prime movement, who seizes a mining facility's weapon array to force all aliens off Earth.
In Star Trek Into Darkness (2013) he plays Fleet Admiral Alexander Marcus, head of Starfleet and father of Carol Marcus, who awakens Khan to help him prepare for war with the Klingons and commands the warship USS Vengeance.