http://www.basketball-reference.com/blog/?p=5956This article confirms what most avid basketball fans already know: having a great big man, especially a great center, gives you the greatest chance of winning a championship.
However, it also reveals that having a great point guard is underrated, since a significant percentage of teams whose best player is a point guard have won it all; there have just been a lot more playoff teams that have relied on a great center.
Perhaps the most interesting thing is that no matter how they change the way they look at things, the Statheads find that teams whose best player was a SF had the lowest chance of winning a championship. Very few teams have won it all with a SF as their best player, and the vast majority of those teams were led by either Larry Bird or John Havlicek. Bird, of course, had McHale and Parrish, too.
Carmelo Anthony, LeBron and Durant seem to be supporting that idea. All of them are fantastic players but they haven't played with any dominant big men so they haven't won yet.
Why do you think SFs have a hard time leading teams to championships?