There are adequate demonstration videos on YouTube showing that it is possible to print very acceptable 28 mm scale miniatures with FDM printers, easily rivaling the quality of resin printers from only a few years ago.
There are a couple of key requirements to get optimum quality for small, highly detailed parts (like miniatures): the smallest practical nozzle (0.2 mm seems to be elected), the smallest practical layer height (for 0.2 mm nozzle, this seems to be 0.1 mm), and optimal temperature and cooling. Supports, if needed, can be optimized for layer skip, interface, and traditional or tree style. It may take several test prints to find the best combination, but once found this should remain fairly constant for a given printer and filament choice.
The final ingredient, of course, is patience -- small nozzle, fine layer height, possibly reduced print speed required for those, mean these prints will take longer than you'd think for the size of the final object -- but if you get the settings right, and are willing to wait, you can get good miniatures with FDM.
For filament choice, I'd suggest PLA, generally -- it's very tolerant stuff, except for temperature, and you aren't likely to leave your minis on the dash of your car in the sun anyway.