You would think Tarzan of the apes would be more apelike...but he's smooth and shiny....not even a little shadow of hair on that bod....
I don't know if he was smooth on purpose during his swimming days (or just naturally smooth), but I'm pretty sure he was made to be smooth-chested in any case for the Tarzan movies, which, like you say, is not very realistic! I think Mike Henry (in the mid-1960s!) was the first hairy-chested Tarzan.These are great shots of Johnny, a man I really never found very attractive, especially as he grew a little older.
Tarzan is the son of a British Lord and Lady, so he is an Englishman. The name "Tarzan" means "white skin". He is "of the apes" because he was raised from infancy by a tribe of apes. This doesn't mean he RESEMBLED a hairy hominid. A smooth-skinned Tarzan is absolutely plausible.