How about this trade?
After the C's sign a free agent this summer with their cap space they send:
Olynyk
Jerebko
Zeller
Mickey
Jackson
Young
+2018 Celtics pick or 2019 Clippers pick
Receive: Carmelo
You get rid of some flotsam in Jerebko, Zeller, Mickey and Phil can cut those guys and sell this as getting a solid sixth man in Olynyk, two promising guards in Young and Jackson who just need playing time, plus a first round pick.
http://www.espn.com/nba/tradeMachine?tradeId=m9f3uzeI'd do this also because it makes room on the roster for Zizic, Yabusele, Nader, 2017 Nets pick, and the new free agent acquisition.
That's six players going out and six players (including Anthony) coming in.