I was able to model some low-profile stands for minifigs using Fusion 360. They should all be really easy to print with a top-stud design that works really well.
Model Dimensions:
Circle 1 x 2: 16 x 16 x 4mm
Square 1 x 2: 16 x 16 x 4mm
Hexagon 1 x 2: 16.2 x 14 x 4mm
Rectangle 1 x 2: 28 x 20 x 4mm
Wall Mount 1 x 2: 28 x 20 x 22mm
Rectangle 1 x 4: 32 x 24 x 4mm
Printed at 0.16mm layer height on my BambuLab P1P using
Sadly the knob size is a bit too small for Minifigure legs. It's just some tenth of a millimeter but the tolerance is just a bit too wide so that you can't get a good grip.
This is at least on my printer (A1 Mini).