James secured a fourth title and the Lakers claimed their first championship since 2010 after routing the Miami Heat 106-93 in Game 6 on Sunday.
The 35-year-old's 11th Finals triple-double of 28 points, 14 rebounds and 10 assists helped deliver a 17th championship to the Lakers at Walt Disney World Resort.
In his 17th season, James moved clear of Magic Johnson, Shaquille O'Neal and Tim Duncan with a fourth MVP – now only trailing Michael Jordan (six).
James also set another NBA playoff record, appearing in his 260th postseason game.
He moved into first place on the all-time list for playoff appearances, surpassing Derek Fisher.
Of the 4,489 players to have participated in an NBA regular-season contest, 63 percent have not reached 260 games.