Educational reform begins by addressing "best practitioners" - teachers and students alike.
The point in putting best practitioners in quotes is to indicate the importance of leading change by focusing more on the educators themselves than on a certain set of practices. If we focus on educators and working collectively in determining their success, I think we'll find that it is not about establishing specific attributes across the profession but rather allowing each educator to reflect and share what attributes they feel they have that fosters their own success. By sharing these opinions and experiences openly, I believe we will begin to see patterns that I believe have a lot to do with pedagogical content knowledge, willingness to lead, willingness to take risks, and willingness to "fail forward". In other words, it's less about some set of inherent attributes an educator has, and more about what the educator is willing to do.