If he wins 2 championships, he, Karaban, and Clingan will be the major pieces from these two.
The only other major contributor to two championships was Shabazz. (Giffey was a role player for one and the 4th best player on another, not quite there).
Among PGs, I think Shabazz gets the nod over Newton, largely by virtue of Newton having been option #3/4 last year and the leader of a balanced team this year, rather than a hero-ball guy who carried the team (which is credit to Hurley for assembling these rosters). It's also a fair question of how Kemba (a 3-year player who also carried his team, vs. Newton as a 2-year guy on fairly balanced teams) compares.