A short while ago, David Lee was considered something of a Warriors burden. He was thought to be a skilled offensive player and a very good rebounder, but such a defensive liability that his $15 million salary in 2015-2016 seemed quite problematic.
This consensus opinion was more than valid, but Golden State has found a way to unleash their power forward's best attributes. First off, GSW changed up their defense.
In the past, they had David Lee race out to thwart guards dribbling around screens. The "showing" tactic exposed Lee's lack of quickness and difficulty in changing directions. It also shredded Golden State's defense. Now, the Warriors have Lee sink backwards as guards run around the screen.
The tweak has improved GSW's defense, and perhaps fueled the best offensive output of David Lee's career. Once a burden, Lee is now somewhere in the top five of power forwards at the moment.
Quick note, before we proceed: I am listing players who almost exclusively play power forward. Though versatile SF/PF guys like Carmelo Anthony, Kevin Durant and LeBron James might dominate this category, we're sticking with prototypical power forwards.