I agree Adams was the top target at the position. Adams and Stone were 1 and 1a for our 2015 targets. I'm guessing if you asked the boneyard in June 2014 just after Stone visited and right before Adams commited who our top target was you would have gotten a lot of votes for Stone.
Regardless, I agree Adams was more important given our current roster needs and KO has been killing it lately. The last center I can think of to headline a recruiting class was probably AO. You could say Drummond was a top target, but his recruiting was a little different than normal.
As of now I'd guess Brown will be the top 2017 target.