Rykoshet
Smash Champion
You can run off the ledge with any aerial but neutral and make it back, up is the best one due to its extended hitbox and it covers the same air/area as bair would in this situation. Alternatively if you actually jump off the ledge you have the options of a rar back air, up air front or a down air then a second front up down or back air with the double jump before you actually need to bother throwing an aether, which should still be high enough to land on the stage assuming they actually grabbed the ledge and are trying to hog you. If they didnt grab the ledge, throwing aether with your back to the stage if theyre standing on the ledge may push them off the stage into an aether spike.