Everyone is focused on the #3 slot, but I'm really excited about that Mavs pick too. Here's my ranking of viable 16th picks; it is likely that at least one of these guys (especially Zizic) will be available.
1. Furkan Korkmaz. Korkmaz is badly, badly underrated. He's an elite shooter with no significant weaknesses on offense. He can shoot efficiently off the bounce and on the move (2014-2016: 72/168 from 3 in 1114 minutes). He has ideal height for a SG (6'7), NBA athleticism, excellent feel for the game, and good enough ballhandling + playmaking that he could play some minutes at PG in the future.
2. Ante Zizic. Zizic has been one of the most productive players in the Adriatic League, despite being just 19 years old. He has been a prolific and extremely efficient scorer, and he has also dominated the boards and collected a solid block rate. His production compares favorably with Nikola Jokic and Jusuf Nurkic, who have both managed to translate Adriatic league production into NBA success.
3. Deyonta Davis. While Davis probably won't last this long, he would be an awesome pick if he does. He's essentially a 6'10 version of Jordan Mickey.
4. Denzel Valentine. I actually like Valentine more than fellow senior Hield, as Valentine has elite feel for the game to go along with his outstanding shooting. This is demonstrated by Valentine's staggering 45.8AST% compared with only a 14.8TOV% (Hield: 12.7%, 14.0%).