I really liked Dietz1's sign of the horns model and I thought it would make a good wall hook. The red hooks were the first revision. I measured the finish screws wrong, which is why they don't sit anywhere near flush.
Revision 2 corrected the hole size and added a 4th screw hole. This allows you to get 2 screws into a stud with 2 using sheetrock anchors for added strength. Revision 3 added a second model, which gave me the choice of the horns facing the wall or facing the room.

Using the print settings below, the stock size (50x50mm base--see picture for size comparison to a Pepsi 1893 can) can easily support the 200ish feet of extension cords or a wet Prudhoe Bay-grade arctic parka.