Dynasty. The word represents the apex in sports. A team so good that it wins multiple championships in a defined era of time, and dominates the landscape in that sport. The Cowboys experienced that once in the 90s when they won three championships in four years, and likely would have done more if Jerry Jones and Jimmy Johnson could have gotten along.
The Cowboys were oh so close to being a dynasty in the 70s, but those pesky Pittsburgh Steelers grabbed the glory with four championship, two of them courtesy of wins over the Cowboys.