I don't see why Anthony would necessarily preclude George or Butler.
I mean if you can get Anthony for something Amir, Zeller, Young, plus some future 1st (like Boston 2019). You could then acquire George or Butler with Crowder, Brown, Jerekbo, and one of the BKN picks (and other 1st's as required). Other players in both tradess added in coming to Boston to help fill out the roster
So trade with Indy for George
Crowder, Brown, Jerekbo, BOS 17, BOS 18 for George, Seraphin
So trade with NY for Anthony
Johnson, Zeller, Young, BOS 19 for Anthony, Plumlee, Vujacic
So post-trades (1 open roster spot and still having BKN 18, MEM, LAC picks)
PG - Thomas, Rozier, Jackson
SG - Bradley, Smart, Vujacic
SF - George, Green
PF - Anthony, Olynyk, Mickey
C - Horford, Seraphin, Plumlee