Nobody knows the future and we are amateurs with no training on how to discern the players' potential. However, the best guess on this would be using the collective wisdom of the best drafting professionals in the NBA, which is revealed through the draft picks order. In short, players drafted with the 3rd pick will most likely end up better then players drafted at the 10th picks etc.
Given that the most likely outcome on who will be better in 5 year is:
1.Taylor Hendricks (9)
2. Cody Williams (10)
3. Keyonte George (16)
4. Brice Sensabaugh (28)
5. Isaiah Collier (29)
6. Kyle Fillipowski (32)
7. Kenneth Lofton (undrafted)