In their 62 year existence the Los Angeles Lakers have won 15 NBA championships and appeared in the Finals 30 times; so if you have been fortunate enough to be a Laker fan you have been guaranteed a championship roughly every four years and at least a championship appearance every two years.
No franchise in sports can match this level of consistency; now I am not saying that the Laker franchise is the best in sports that would be impossible to single out just one franchise and put them above everyone else.
Out of all the great franchises the Lakers have not had a drought longer than ten years in where they were not in championship contention; the same can not be said for some of the most storied franchises like the New York Yankees who went 15 years without even winning a division title and 18 years without winning a championship at all. The Lakers had a gap of 18 years without winning a championship but they were in the NBA Finals eight of those years.
In hockey you have the Montreal Canadiens who have won 24 Stanley Cups, but they have not won a cup since 1993 when Patrick Roy was between the pipes. The NFL features two standout franchises the Green Bay Packers and the Pittsburgh Steelers; I picked these two because Green Bay has the most championships with 12 and Pittsburgh has the most Super Bowl wins with six. I believe Pittsburgh has also been the most consistent NFL franchise since the merger.
Green Bay despite also all it's history went 29 years between championships and only had five winning seasons between 1968-1991. I know I am leaving out a franchise and did on purpose; that other great NBA franchise from up north. The Boston Celtics have an NBA record 17 championships and hold a 10-2 Finals record over the Lakers; but they also have a 22 year championship gap from 1986 to 2008. Boston has had only one dominant period during their history and that was the Bill Russell era.
The Lakers have had three dominate periods in the 50's, 80's and 00; think about this they were the NBA's first dynasty with George Mikan and it's last team of the decade with the 09 championship. It does not get any more consistent than that.l