Which actor played Tarzan and acted in Mr Blandings Builds his Dream House?

The actor who played Tarzan and also starred in "Mr. Blandings Builds His Dream House" is Cary Grant. He portrayed the character Jim Blandings in the 1948 film, while his connection to Tarzan comes from his iconic status in Hollywood, although he did not portray Tarzan himself. However, it's worth noting that Johnny Weissmuller is the actor most famously associated with the role of Tarzan.