This won't be the best 'good ending' to suit your tastes. Side quests for all three factions are open to you along with various post-event quests.If your idea of a 'good ending' is everyone dead and a giant pile of pillows that you stole from all corners of the Commonwealth placed in one room guarded by nukemines and missile turrets, then.yeah. You are a high-ranking knight in the Brotherhood, a major asset of the Railroad, and (of course) the leader of the Minutemen. This ending keeps all the major factions alive and happy with you. But, since karma doesn't exist in Fallout 4, this ending is best described as putting the Commonwealth into a state of strong stability for all of the major players (except for the Institute.those slaving, murdering bastards get nuked).
Previously, this might have been called a 'good karma' ending. A 'good ending' is in the eye of the beholder, of course.
