Keep Tarzan On the Shelf. There is NO Modern Day actor that can bring the presence of Lord Greystoke to the screen. It can't be done without an Actor that brings Serious PRESENCE. I'm talking When Tarzan is in the room, "No words necessary, YOU JUST KNOW just he's there" type Presence. Again No Modern Day actor brings that aura with him.
Any suggestions on who MIGHT be a fair casting choice?