Brian Epstein was an impresario in every possible manner.       Largely because of Brian, the term has moved from one who organizes and finances public performances to the organizer.     An impresario in the Epstein model is a connector -  one who recognizes talent, and is willing to go against the grain, and take risk to unite new, exciting and interesting ideas.     It certainly helps to have a talent as large as the Beatles covering your aspirations, but Brian understood, improved and presented the best version of "his boys" to the world, allowing the group to "loom large in his [Brian's] legend"