Robin Sachs was most well known as an actor for his science fiction and fantasy work. He was in Babylon 5 as a guest star six TV episodes and the TV movie In the Beginning. He played Minbari Warrior Caste members of the Grey Council and two Narns.
He also played the main villain in the movie Galaxy Quest and did the main voice work for the video games Mass Effect 2 and 3. He was in Buffy the Vampire Slayer and Torchwood among many other roles.
Other Babylon 5 Actors who have died
On radio it was stated that seven Babylon 5 actors have died. I know of six including Robin Sachs.
Andreas Katsulas (G’Kar)
Richard Biggs (Dr. Stephen Franklin)
Michael O’Hare (Jeffrey Sinclair – Valen)
Jeff Conaway who played Zach (also known for being in the movie Grease and the TV show Taxi)
Tim Choate (Zathras)