If Shabazz or Carter-Williams or Nerlens Noel (

yeah, I know he won't) slip to #16, you pick them. If not, I'd rather pick Saric and buy a second rounder to get Kenny Kadji than a project big who will have to walk the Melo route. Kadji is a big PF (6'11) who is athletic enough to play some P&R defense and he's also a fairly good shooter to help on offense. He's also 25, so he should be mature enough to help next season.
Adams is intriguing, though, but his 44% FT shooting scares me. Olynyk is skilled, he could also help, but his short arms could hurt him in the NBA. Dieng and Withey are good defenders, as Rudy Gobert, but they aren't as talented as Saric, Muhammad or MCW. At #16 you should go for the eventual Rondo/Big Al even if you end up with Banks/Gerald Green.
Buy another late second rounder if Ricky Ledo is still there and try to develop him as a 6th man type scorer. I don't buy the late first promise story and he might be a late second round home run.