It it just amazing that there is so much HR thought leadership going on that the UK HR Magazine came out with a list of the the top Global thought leaders. So I spent some time reading about these folks and thought you might like this too! Just to disclaim, the original list is ranked via voting from the members.
Professor Edgar Schein:
Professor Edgar Schein, a former professor at the MIT Sloan School of Management has made a notable mark on the organizational Development HR world! He is a graduate of Stanford, University of Chicago, and Harvard university.
Here is a great series of videos of a Keynote speech that he gave that you might enjoy!