Personally i think such a group could never exist ...
So another method than waiting the 5mins is to prepare the items your gonna drop in a game create a new one with a short name an easy to write (see yourself for the pass), once your in the game u hav 1min to drop the items and come back on game with another character (u can use the cube if u hav a lot of them, drop it while you have no more place left on character).You can use the tab button to switch fast from account/game name to pass, and enter to accept .
This technique can be dangerous when the realm has problems or if you hav this nasty error message when changing account, if this happens use the windows button or alt + tab to get out of diablo stop an relaunch internet connexion, back into diablo try again to go into game ...
It's no use to say you must be very fast and don't forget the game name or pass ! (this kind of stupid things do arrive).Try this out with low value items before, personnaly i have lost sometimes items for the different reasons on top, shaft was the most valueable, but believe me it is very rare !
Good luck mulling