Keep Hibbert and George. Everyone else is on the trade block for expiring deals and picks. Use this year's lottery pick and assets gathered to secure the third potential star/option. Use cap space to get role player that can assist you with a 3 year run.
The George/Hibbert idea is enticing on its face. I think that there are two problems with it, and the second impacts the first.
First, Hibbert is a free agent next year, he may go or he could stay.
Second, allegedly, George and Hibbert have a history. George has done a bunch of unsavory stuff. One of the things that he has been rumored to have done is to have had a secretive, then not so secretive relationship with Hibbert's fiancee. Lance Stephenson during a playoffs practice supposedly called out Hibbert for his poor second half of the season performance by telling him he was butt-hurt over George doing his girlfriend, That's when ET jumped in for the public airing and embarassment of Hibbert and the bloody fistfight happened between him and Sir Lance.
That could be a mend-able fence, but I'm not sure.