I'm sorry Reggie is giving Oscar (and you) such a hard time.
I agree that for now it's best for Reggie to be separated from Oscar (different rooms) for at the very least a few weeks in order to hopefully give him the required time cool down and have his hormones more under control.
During this time you will have to divide yourself into the two rooms to cater to Reggie/Buster's and Oscar's needs (including daily attention/interaction and out of cage activities).
I hope everything goes well and later on you will be able to re-introduce Oscar to Reggie and Buster.
RIP sweet Tito (Summer 2008 - January 17th 2013).
You are missed and never will be forgotten.