John Noble
John Noble (born 20 August 1948) is an Australian actor. He is known for his roles as Denethor in the Lord of the Rings film trilogy, Dr. Walter Bishop on the science fiction series Fringe, Henry Parrish on the action-horror series Sleepy Hollow, and Morland Holmes on the police procedural Elementary. Noble has also done voice work as Leland Monroe in the video game L.A. Noire, Unicron in the animated series Transformers: Prime, and Scarecrow in the DC Comics video game Batman: Arkham Knight.
Description above from the Wikipedia article John Noble, licensed under CC-BY-SA, full list of contributors on Wikipedia.
The Lord of the Rings: The Return of the King
The Lord of the Rings: The Two Towers
The Boys
The Conjuring: The Devil Made Me Do It
The Last Airbender
The Blacklist
Fringe
Severance
DC's Legends of Tomorrow
Elementary
Stargate SG-1
24