how can i fill these boundaries by quad topology? I am currently modelling a Audi R8(2016). I am doing the part behind the door. However i have a problem in filling up these faces 

I have tried using the grid fill tool but it doesn't work out well. It creates a weird seam in the middle part.


I want a topology somewhat like this.


Any help would be appreciated.Thank You In Advance.
I saw this pop up and even though it is an old question thought it worthwhile putting forward an answer. The original image is not great but here is a mesh that will work and is adaptable.



With matcap in object mode and a subdivison surface x 2



A simple bend deformer applied shows the deformation without any artifacts/creasing/lighting issues.



Extruded with bend modifier