ORIGINAL: SWAMPMAN
I stand corrected about Chuck Mawhinney. His confirmed kills are indeed more than Gunny Hathcocks. His total was 103 confirmed and many more unconfirmed. However, since he wanted no public accolades, most people never heard of him.
Chuck is a quiet and reserved man, but not beyond accepting some attention. He's been scene on TV and, AFAIK, has made his way to a few sniper community events. I've never met him, but he sure appears to fit the "quiet professional" mold.
Don't get me wrong SWAMPMAN - Gunny Hathcock is still THE man in my book. What set Hatchcock apart was his fieldcraft, some dramatic engagements, and a lifelong commitment to improving the sniping profession (and in particular the USMC sniping community).