I don't think there is a singular name that can be attached to the title of Best Engraver. There are so many styles of engraving and each one has a "best name" attached to it. English scroll? Game scene? Deep relief? Bank note? There are even variations within these from the Italians, English, and Germans. Each one can easily be titled as the world's best, in my opinion. I'm not an expert on engraving, and it's a choice I couldn't make, but I always know when I see it.