I also think he is one of the best coaches ever, but for this thread lets go with rebuilder. Now the Bobcats 1st playoffs ever, altho they had only one way to go that being up.
9 different teams to playoffs.
Clippers back to back. (That should end any and all discussions about who is the greatest rebuilder, but i know there are some boardies who claim that was not a big deal.)
NCAA and NBA Championships
Philly and Detroit to Finals.
Downside. His flirting with the Cleveland Cavs GM job while the Pistons were trying to upend the SuperSpurs in the 2005 Finals was mega bogus.