M.D.
Sometimes letting them have too much control for things they really can't handle yet leads to them craving more and more control. I would take a really good look at the things she is trying to control, that you could take back control of, and tell her that she's not ready to handle those things, that you will control those things until she's a little older.
I would also isolate her in her room or away from other people somehow when she starts arguing or yelling at her siblings. If she does need attention, she certainly needs to know that that's not the way to get it. It will mean lots of screaming and crying at first but be consistent and I think she will get the message within a few days. Good luck!