Each time I used one of the 3D printed wedge-style doorstops, I always had a problem where they would easily slide out from under the door when the door was moved slightly. I created this design, which can be used as a standard doorstop, but can also be placed from the side, providing a more stable lock, with lesser risk of coming out.

There's an integrated foot platform to easily slide the doorstop in & out from under the door!

PETG recommended, although I also printed one in PLA and it seems to work fine.