The Kia EV9 is about as boxy as you can get, but it has a drag coefficient of .28, which is a bit lower than the passenger car average of .3. The model Y and 3 are at .23 for reference. SUVs are usually in the .4-.5 range. I think you could get away with not having the front end like that. Change the front end, and change that ridiculously small rear door window, and it might be a decent truck.
I actually really like the Superduty. With the black appearance and tremor packages, it’s probably one of the best looking trucks around.