If you have the keys to spare (I love my G11 keyboard), you can bind the "Interact with Target" key for your alts to different keys.
Erm. Why would you want to do that?

I have mine set to a single key for all characters and just let them fight amongst themselves for completion. Once I see that they're all done (from QH, or the fact that the corpse still glitters after they've finished looting) I start picking the stuff up on my main.

My main has the same key bind of course, but I just make sure he's out of range to actually loot until they're done.

With click-to-move on the drones, they all march over and loot the far-away bodies while my main stays where he was.

It's all become really easy with interact and click-to-move working together