The NBA is a place where superstars rule the roost, but it's hard to really have a great basketball team if the guys surrounding the superstars are sub-par players.
Sometimes you can get by without a superstar if you've got a number of very good players on the staff ready to work together and create a team capable of playing a cohesive offensive and defensive game to trump any one or two player punch out there. The last time that really happened in earnest was with Detroit back in 2004.
Even with a system like that, there's a hierarchy in place in which some players are more valuable than others in the eyes of the team, the fans and the ownership holding it all together. Often, those guys are the ones who aren't necessarily overlooked, but are under-appreciated by those outside of the situation.
Each team has the player or players who are quite obviously on the top of the food chain, but it's not always a huge distance between those guys and the next guys in line as is the belief by quite a few people.
These players can sometimes be more coveted than the actual star player in that they hold the team together and command less attention from the public. They're stealthily superb.