I would say that there are a number of guys that have changed my life through their work and writing. I find that most of the inspiration for hunting has happened from books. G. Fred Asbell's Ground Stalking book inspired me to start looking at the hunt in a different way.
Dr. Don Thomas' books changed my life. They did so to the point that I believed that I could hunt all over the world and achieve any goal if I wanted to. I also ended up with a lab and started waterfowling and fly-fishing....reading 8-10 books by the guy has become a damn expensive undertaking.

I tell you what though it has given me a lot of joy and fulfillment, and I will be eternally grateful.
Next up I would say would be Dave Peterson. I just finished his "Man Made of Elk" and the ethics and issues that are in it spoke to me in a very poignant way. I know the things that he brings up have changed how I view land use and inspired me to learn/do more on a local level about things that aren't right. I will be looking into more of Mr. Peterson's work.
I am just finishing Mike Mitten's book "One With the Wilderness" and I have a feeling that he has just changed my life in terms of hunting. There will be a lot more solo backpack trips in my future. I have wanted to hunt this way for some time and strangely Mr. Mitten seems to have given me the permission to pursue that dream no matter what other people say about it.
Those are a small list of some of the idols/heros/inspirations whatever you want to call them. To me these guys are not the be all and end all, there are a lot of great hunters and inspirational people out there, these are just the ones that have affected me the most.
If you haven't seen the work from the above gentlemen I would strongly suggest that you do, of course like I said you have to be careful it might change your life.
Allan