Robert Sapolsky is one of my favorite anthropological types around. (technically, he is a neuroscientist and a primatologist). Not only does he study some amazingly fascinating topics (ie the fact that humans and other primates are smart enough to basically "make ourselves sick" by stressing out), but he is also an excellent speaker, writer, and general communicator of anthropological ideas. We need more and more Sapolsky's, that's for sure. Here's a short clip that I often use in intro classes:
Another great video is Sapolsky's 2009 Class Day Lecture at Stanford on"The Uniqueness of Humans."