Zhou Qi, please. Currently #20DX. I've never seen such an elite prospect get so little hype.
-7'2 with a 7'7 wingspan
-Elite mobility and coordination for a 7-footer. Quickness to consistently guard stretch 4's.
-Excellent CBA stats: 18ppg on .689FG%, 10REB, .736FT% on 7FT/g, 1.4AST/1.35TOV, 1.05STL, 3.65BLK. 5/8 from 3.
-Stats compare favorably to Yao Ming at the same age
-Very good midrange shooter, at least some ability to hit 3's
-Reportedly a smart player with very good feel for the game. Supported by >1ast/tov
-Advanced post moves.
The two key question marks for Qi are his strength (210lb) and the level of competition in the CBA. However, he's dominating weak competition pretty thoroughly (3.65bpg, ultra-efficient 18ppg), and an NBA weight program will do a world of good for him. To me these concerns are serious enough to keep him out of the conversation for a top 3 pick, but he remains the most underrated prospect in the world.