The New York Knicks are in the NBA Finals for the first time in 27 years for very clear reasons. They compete with passion and joy, and they play offense and defense with a selflessness that defined the franchise’s only two title teams in the 1970s.Nothing is mysterious about these history-making Knicks, other than the executive who assembled them.On the night his team completed its Eastern Conference finals sweep of the Cleveland Cavaliers, Leon Rose was seen getting emotional in a video posted on X by @goatcollect that showed the Knicks president wrapping an arm around his son, Sam, the agent who reps Jalen Brunson — whose father, Rick, a Knicks assistant, was Leon’s first client.It’s a family affair across the board, and the patriarch runs his business under the terms of omertà. Rose does not meet with the independent media that covers the Knicks. He is the silent star of a big-city blockbuster that might end in a ticker-tape parade.On cue, the Knicks said Wednesday that Rose was not available to comment on the conference champ he built piece by piece, after Knicks governor James Dolan took a huge gamble in 2020 by hiring him away from his comfortable life as a CAA super-agent. Rose had repped the likes of LeBron James, Carmelo Anthony, Allen Iverson and Chris Paul, meaning he had a lot of experience negotiating mega-deals with NBA teams.And no experience finding the balance between superstardom and complementary parts required of a championship-level roster.