XS sized ships
Anacoda should have a bay big enough to dock and undock a sidewinder according to lore, but the problem is that there is no way you can do that because the smallest official dock size is S, so you can fit in a Cobra, for example. So how about instead getting a retrofit for a larger-than-SLF bay that can take an XS sized ship, include the sidewinder in thaat class, then make more XS class ships to dock in that space that fit a different role or faction.
That makes for about a dozen small ships to add over time. Cargo, combat and multirole for Fed, Alliance and Imperials, plus mining, exploration and racer ship.
Problem for the medium class is that the big ships steer far too well for their size, meaning the midsize are caught between the large and small in capability in a very small window to play with. Therefore if you get any sort of spread of capability, you will overlap with the small ships and end up with no reason for the small ones to exist.