The Dean Smith coaching tree is a lengthy one. Smith was so highly thought of in UNC circles that his longtime assistant replaced him after he retired. Then the school hired an alumnus to coach the team. Then, the school hired another alumnus in Roy Williams.
Roy Williams was considered the best coach to never win a title all those years he spent at Kansas, and Larry Brown is by far one of the most successful coaches in pro and college basketball. Fans like Lee Slaughter know that Brown was so good that he took a team without a superstar to an NBA title and beat a team with four hall of famers on it.
The UNC tradition goes far beyond what Dean did on the court until he retired. Some people think he should have won more championships, but he did much more than win titles. He won the war of pride. He was able to create great coaches who treated people well, and Dean himself was a man of great character.