I'm inclined to say yes,but I'm gonna put up some images for you to look at.
Your LE was probably optimized by Toyota and may already be at it's sweet-spot for backlight angle,trunk height,trunk length,and C-pillar design.
With the Dodge Daytona,you'll see that as the void under the 'Template' is filled in,the drag shows a downward trend generally.
With the VW Golf,you also see that the drag is lowest when the roofline is closest to the 'Template.'
Finally,you can see how the Mercedes-Benz,already near the 'Template',reaches lower drag as more and more length (boat-tailing) is added.
Kamm use a profile very close to the '
Template' and a comparison of the Camry to it might give you some ideas.
Here's the tables:
