How can I flatten shape to merge into a flat surface smoothly?


I am new to Rhino and looking to flatten a pre-modeled shape to merge seamlessly into a flat surface. I have tried a few ideas as well as used a patch but it doesn’t work to the level I require. I’m hoping someone has a better idea on how I can manage this. as it is probably something basic I may have over looked.

The first image is the shape (ear) and the surface, the second is my attempt at patching the merge. and the rendered result. Any help would be greatly appreciated.