If you don't want to feel air around your helmet you got to have the top of the windshield above your helmet. No way around it.
Sorry - but defintely not true. With the right shield you can have a quiet, relatively still air pocket while still looking over the top of the shield (incl at go straight to jail type speeds). I say relatively, as even behind the largest screen, there will still be some air flow
The downside to that nice quiet pocket of air is slightly lower mileage, with
best freeway mileage being with no screen at all