A symmetrical KFm4 design the MicroWing is about as simple as it gets. With only a few simple panels cut from 5mm foam board and a drop of hot glue the build takes only a few hours from start to finish.
 
These days the motor from a racing drone would be perfect for something this size, mounted onto either a 3D printed or ply firewall.
 
This one was never meant for FPV but there’s no reason a small camera couldn’t be put into the nose.