The "Amen Brother" drum break is far from the most sampled or most famous drum break in history. Check out a list of more heavily sampled breaks here: http://the-breaks.com/stats.php

The above list is far from complete, obviously. If I had to put my money on it, id say the most sampled drum break is "Impeach The President" http://www.youtube.com/watch?v=wqbEsS5kFb8