Charlton Heston was the NRA presidents till his death last year. I believe Tom Selleck is a NRA member for life. Kayne Robinson is the current president. Wayne LaPierre is the current executive Vice President & CEO for years. Wayne LaPierre is the person that makes most of the decision in the NRA. The President is more of a ceremony post within the NRA.
http://www.nraleaders.com/
Over 95% of all NRA members vote in elections. That's where the NRA powers comes from.