The work Stargate did on APWNN was absolutely phenomenal and is easily my most played from the Xscape album. Quite possibly the best executed song I've heard from MJ posthumously. Rodney Jerkins pushed Xscape to even higher levels with his 2014 contemporisation (that chorus god-damn) and Timbaland did a great job on a number of the tracks he was given; specifically LNFSG, Loving You and STTR.
LNFSG is groovy as hell, Loving You has a perfectly fitting instrumental and STTR? I could dance to that all day (and don't get me started on that breakdown that was heard in the Billboard hologram mix!). When Timbaland gets it right on Xscape, god damn does he get it right! In saying all of that, Chicago's contemporisation was terrible and DYKWYCA... well neither his version or the demo were as good as the 2010 Michael mix. I never really cared for Blue Gangsta as a song although I loved Timbaland's atmospheric intro. Wish it went for longer actually.
In regards to the Michael album, I liked what Neff-U did instrumentally with Hollywood Tonight (as did many of my friends at the time). Akon, MJ and Tuinfort did a solid job on Hold My Hand too.
So in rough order, I suppose:
1. Stargate/Teddy Riley (yep, a tie).
2. Timbaland
3. Neff-U.
4. Akon/Tuinfort/MJ.