I didn’t know Warner played Keith Jennings, a photo-journalist who becomes one of the evil Damien’s victims, in the classic horror movie The Omen. That was a great role.
Good memory! I forgot about that. Also, if you can find it, there is an interesting feature film from around 1980 called THE ISLAND where he plays a modern errs pirate who thinks it’s still the 18th century. Haven’t seen it in 40 years but I remember it being really good.