Charlton Heston -- Are You God?
The video window to your right has a nice, short montage of Charlton Heston's finest moments, set to music.
In the universe of today's mega-movie stars, there are certainly a few who are truly piss-poor actors -- I'm looking at you, Keanu Reeves -- but most can render a scene in a minimally convincing manner. By today's standards, many of the great stars of the Golden Age of Hollywood appear incredibly ham-fisted -- hackneyed and way, way over-the-top. A different school of acting was ascendant in those days.
Behold, for example, one of the best 17 seconds of Heston's career: