I seem to remember that one or two adversaries in the original Black Widow scenario book were something like 2/3 pilots (I think one of them was named "Vang"?). That would put them as better than the Blackwidow. Those probably deserve mention.
There might be a few of those Carlos Hathcock types around. That have plenty of kills, but you never heard of them if you didn't specifically go looking into it.
Jake: How come nobody ever heard of you? I mean, a man that can shoot like you do and draw as fast as you can... how come you ain't got a reputation?
Jason McCullough: What would I want with a reputation? That's a good way to get yourself killed.
That might just be the desire of a few of those line holding mechwarriors. Guys that drove their families old trenchbucket through the 3rd SW, always managed to give better than they got, but want no part of being renown.