People may have more individual movies, but as far as franchises go he is like the king:
Lord of the Rings
Marvel
Star Wars
Planet of the Apes
He can also say he portrayed characters created by J.R.R. Tolkien and Stan Lee/Jack Kirby. That may put him in a class by himself. Benedict Cumberbatch comes close with Tolkien and Lee/Ditko (Doctor Strange), but that's all I can think of off the top of my head.