How about..
BOS: Lee, Sullinger, Young (or Hunter, whoever you like less), 2016 Dallas 1st, 2016 Miami 2nd
ATL: Horford, Korver, Holiday
If Atlanta really doesn't think Horford is coming back it's hard to imagine they do better than this deal. Sullinger is a 10/10 guy with consistent minutes who's only 23, still improving and under RFA control. Young is a raw sweet shooting wing who I think could find a niche in Atlanta with Bud. He's kind of like a replacement for late-1st, and the Dallas pick which seems likely to be just outside the lottery. Rumor was that they're open to trading Korver too, and the C's could certainly use a guy with his stroke to help keep the offense running. Holiday is a young, fairly unheralded guy you take a flyer on to fill Young's spot. I think we'll start struggling a little more on the boards without Sully though.
Question is, if Sully is the only rotation player going out in the deal, and Horford is obviously going to play more minutes than Sully has, who loses theirs? If you could get Korver he's gotta take minutes too. Jerebko's? Turner's? Amir and AB?