It seems that most of the drywall mounts that I looked for printed in a vertical orientation, which is not good for strength.
For once, I didn’t reverse engineer anything to design this. Lulz.
https://www.printables.com/model/548516-printable-drywall-mount
Update 8/10 - Added dimension sketches, Added .step file, Added a thinner support ring option that will sit more flush (but not completely)
You can yell at me all you want! If you need a hug, I can get you one of those as well, no charge.
I am using some of the mounts now for some pictures, but I can say they are extremely stout, at least the way I printed them. You have to use a hammer to tap them in the last little bit so it doesn’t spin. They survived some fairly hard love taps, and once the screw was in, they aren’t moving.
Your personal experience may be different.