Might be kind of hard to find them all, or get real accurate info. I am sure there are a lot of guys like my grandpa, who were handed an 03A4 or scoped M1, shown how to use the scope, and presto chango, you are a sniper. Grandpa said he was selected, when his CO was asked to provide his best shot for a special assignment. It seems to me that he probably was used more as a counter sniper/company DM, but that is how it was then.
Know your enemy and yourself, and you need not fear the outcome of a hundred battles-SunTzu
Practice does not make perfect, PERFECT PRACTICE MAKES PERFECT-OSP Drill Instructor
Not enough people or commanders know how to make or how to employ a sniper today. Think about how much worse it would have been back then. Those guys forged the road into the snipers we have today I guess.
People forget after wars how effective they were and say they don't need them. Then there's always a rush to bring them back.
Remember in Nam with the first air to air missles they said they didn't need cannons on fighters anymore? lol