I see.
Regards to the pcb adapter i think that simple is the best. Over all, it's just an adapter and it takes no effort to add an pulldown in the breadboard and or resistor to the gate.
So i thinking to just make an adaptor with footprint for the mosfet and three holes for the pins.
Maybe n multi board with a place for several package formats on same pcb with an jumper or so for connect the respective mosfet to the circuit? Just thInking here 