Say Golden state misses the playoffs and we get the 14th pick from them. We trade kanter and the 14th pick for bostons 5th pick and take dante exum. (maybe we have to sign and trade Hayward to them too, or throw in burks.)
Jazz win the lottery and get the number 1 pick and draft wiggins.
Lebron seems to be very concerned/aware with his legacy and where he will end up historically in the nba.
So Dennis Lindsey pitches it to LeBron like this. "We have a very young talented team (exum, burks/Hayward, wiggins, favors, burke, marvin, neto, evans, WCS with our second rounder) and you could be the first player to take a team from last place in the conference to a title in one year. We will pay you the max and go after whatever coach you choose."
He still says no but what the hell. Worth a try imo.
Edit: Also he would have the opportunity to take a small market team that has never won a title to a championship. He would be legendary if he pulled it off.