I did not find yet better, also so many wonderful speeches one can find on TED!
Ben Dunlap talks about a passionate life | Video on TED.com
Sit back and listen, as Ben Dunlap tells the story of Sandor Teszler, a Hungarian man he met at Wofford College. In telling Teszler's life, but also his meeting with him and other similar "Hungarians" and mostly about the thirst to learn more and more, and the need to prove equality between humans.
But mostly, this is a great example of voice variety, of body movement, we did not even realise, and of wonderful Storytelling.