Drivers seat so uncomfortable

I've had the 25 Equinox LT for a week and I still can't find a comfortable setting for the drivers seat. I have the Convenience package II so it's has power and lumbar adjustments. I've tried every adjustment. I think the problem is the headrest doesn't tilt and my mid back (right under shoulder blades) jet out further then they should. Does anyone have any advice to get the right fit? I'm 6'3" so maybe my height is a problem. Any others with similar height like the seats?