Tarzán de los monos

...because of his already established reputation as a Hollywood strong man (e.g. his role as the Mighty Man of Valor in the 1916 DW Griffith classic "Intolerance").

Also, the image of Tarzan in 1918 was not that of a lithe gymnast like Christopher Lambert in "Greystoke", but of a man powerful enough to wrestle lions. Strength equalled bulk.

There's an interesting piece of trivia attached to that movie and Uganda (that's in East Africa) where I'm now based. There's a popular myth around here that the 1918 version of "Tarzan of the Apes" was filmed on the northern shores of Lake Victoria. In fact it was shot, I believe, in Louisiana.