Profar is the best prospect in the minors this year thanks to an incredible combination of tools, skills, and baseball instincts rarely found in players who play in the middle of the field. His feel for the game is unusual for a player of any age, much less a teenager, and should put another nail in the coffin of the old saw that American-born players have better instincts.
Other Rangers in the rankings:
No. 71, 3B Mike Olt
No. 90, RHP Cody Buckel
No. 93, LHP Martin Perez
Law has writeups on those too, but you'll need to be an insider to read it (and it's worth it).