The short answer is Rick Adelman.
On the court, Rubio. He's the brains of the operation on the court. When things were going well, he was an extension of Adelman on the court, and even then, if guys like Barea and Ridnour had something to say, he'd listen. I've said a million times, he's the difference between winning and losing.
The attitude of the team has to come from Love. He's the longest tenured guy here. He's getting the major money. He's the 2 time all-star, and he's so statistically unique that having him here helps us almost as much as Rubio does. He's a hustler too, so he's an example of what to do to make your game better. Many can learn from him here, especially Derrick.