I agree with most that it's the Spurs.
Some other good choices were brought up, but the Thunder for example have just gotten good recently. And while they've been smart, they also drafted one of the 5 best players in the league (Durant) and had 3 other draft picks pan out well (Green, Westbrook, and Harden).
A lot of the good teams now went from the lottery to the playoffs after drafting a superstar. None of those teams have won yet (maybe the Heat with Wade but they got Shaq on a discount after the Kobe beef).
The Spurs have ridden out their superstar for over a decade and wisely built a team around him. They've never blown everything up. They've kept their core and tinkered with the supporting cast. I wonder if their fans are going "we need to dump Duncan, Manu, and Parker to rebuild." Granted their record is much better than ours, but not a lot of people are giving them a legitimate shot this year for the same reasons they don't give us one.
If that's our model, then the "let's blow it up and hope we draft a superstar" plan shouldn't be our play. Field a competitive team for as long as we can, don't overpay players, don't get desperate for trades.