I mean, seeing any death can arguably be traumatic. Someone could find a body that's in pristine condition, no injuries or decomp, and still get PTSD from it. Regardless of what you do, if you're not found soon after death, the scene will probably not look all that great (especially if a length of time has passed).
I do know that shotguns removing half of your skull are, uh, a popular shock video trope for a reason though.