First off, I need to get the basic shape down. The BBJ probably will work, so I need to try one.
Shorter is perhaps OK for your shoulders, Norm, but that does not work for me for reasons stated. Again, that right-shifts the guitar and that's the opposite of what I want. I want the guitar left-shifted. The way to make that happen is with a longer body shape.
Different body types fit things differently… Automobile manufacturer and clothing designers don't get this either… They design clothes and cars I can't fit into. No jeans fit me and with my broad shoulders, few coats that aren't designed for obese men will, either. In the most obnoxious cases, I hear things like "Oh, you can fit in the car, just lean the seat way back." Guitar builders will say these general-purpose best practices, too; things like "a strap button on a long horn is best because it gives the guitar more stability" without considering that that right-shifts the guitar and pulls it too close to the player's torso. Some players have a more prominent breastplate abdomen, with set-back shoulders and for those players, it can work. I have the opposite.
The counterweight for a headless guitar idea is getting ahead and seems unnecessary. Rather, chambering the guitar and choosing a lighter tone block will lighten it and that will be better.