This song was 2 separate songs, that got combined into one, and then Lennon and McCartney thought it was a good idea to bring some orchestra in the middle and let the musicians wear funny glasses and hats as if it was a new year's eve party. Having mysterious lyrics about death and drugs certainly helped.
You really need balls to make such songs because they are destined to either fail miserably or achieve overwhelming success. The Beatles had balls but also had a lot of talent.
The only song somewhat similar is Bohemian Rhapsody, but I prefer A Day in the Life.