Call me crazy, but I think Kopitar, Doughty, Brown, and Quick are the four most important Kings in the organization's history.
For starters, the two players with the most games played all time in a Kings sweater are Brown (1296) and Kopitar (1226), and Doughty's (1030) currently fifth on the list, about a hundred games (or two seasons) away from leapfrogging Robitaille and Taylor. So the games played argument is moot.
While we're at it, Quick holds every goalie record in LA. Games played, wins, shutouts, save percentage, saves, everything. No one even comes close to him. He has to be on this, regardless of anyone else.
Let's also not forget that these were the four most important players on the Kings' two cup-winning rosters. Quick won a Conn Smythe in 2012. Brown is the first Kings player to touch the cup. Kopitar and Brown led the playoffs in goals scored and points in 2012, Doughty was fifth, and Quick had an unbelievable .946 save percentage. Kopitar also led the 2014 playoffs in scoring.
Gretzky was Gretzky, but he was Gretzky before he came to LA. Robitaille, Taylor, Dionne, and Vachon were all great players, but none of them accomplished in LA what Brown, Kopitar, Doughty, and Quick accomplished. That's my LA Kings Mt. Rushmore.