Elvis Andrus-SS- Braves
This kid signed in 2005, but is still very young and raw. He has huge upside and will be in Baseball AMerica's top 50 prospects despite his extreme youth. He is more projectable than any of the guys in my above post because he has already played proball and excelled.
If you're gonna mention Elvis, you gotta mention Fernando Martinez-OF - NYM. But I figured since he has Tabata he knows about both of those guys...I think Andrus will be in more of the 55-65 range than top 50, while Tabata and Martinez are both easily top 50 guys.
Esmeilyn Gonzalez-SS - WAS could end up being better than Andrus
...Even I don't know all those other guys you mentioned, but I have heard very good things about Angel Villalona