No, there is no team in NBA history that has won the championship with an all-time or perfect record in regular-season games. In terms of playoff victories, the best regular season record to date belongs to the Golden State Warriors in 2016, who won 73 straight regular season games and had the best win-loss record in NBA history at that time (72-10-1). If we exclude the regular season, no team in NBA history has won the championship multiple times, with the New Jersey Nets holding the record with their 1996-1997 season, which featured a regular season record of 72-10-1 and a championship win.
Phil Jackson, widely regarded as "The Big Man" in basketball, holds the record for the most championship titles won by a player and coach in NBA history, having won 11 championships during his career as both a player and a coach. While players' individual reigns as "The Great One" only include two championships due to limited number of seasons under one head coach, as seen when considering total NBA championships, not including playoffs, it's fair to say that Jackson's impact on the game was unparalleled, given the fact that he spent 13 seasons as a player and four as a coach, accumulating 11 NBA titles.
In nine years, including eight titles with the Chicago Bulls (with Jordan, Kobe, and Michael Jordan) and one title with the Houston Rockets, NBA legend Kareem Abdul-Jabbar achieved an impressive 16 championship ring throughout his playing and coaching careers. In addition to winning these titles, Abdul-Jabbar is also credited with many groundbreaking rules and innovations that have become integral parts of modern basketball, such as the clock code and the All-Star Game, further cementing his status as a trailblazer.
"Redeemer" is often used to refer to Kareem Abdul-Jabbar, the head coach of the Boston Celtics who led them to a 40-year dynasty. His accomplishments include establishing the Celtics' enduring legacy through four consecutive NBA championships and continuing to be an iconic figure in the sport's culture with his ultimate victory celebration ritual involving igniting a cigar after each win. This characteristic of Abdul-Jabbar's postgame routine became so synonymous with his triumphs that victory cigars were now symbols of sports victory across the globe.