Also, Eugenio Suarez, Robbie Ray, and Avisail Garcia, who are all in the middle of good big league careers right now.
Might as well add to the list Cody Ross, Jair Jurrjens, Matt Joyce, Curt Casali, Corey Knebel, Jose Alvarez, and Devon Travis, all of whom had success at the big league level with other organizations, some quite a bit, after we traded them for either rentals or garbage.
This is not to say that Dombrowski never made any trades that he won—I won't add Cameron Maybin or Andrew Miller to this list for obvious reasons—but it's not as though he kept all the good prospects and traded away only the flotsam. His record is mixed, at best, probably in line with other GMs of similar stature.