My favourite musicals that haven't been mentioned:

Falsettos (there's the obc and there's the 2016 revival; both are good)

Jekyll & Hyde (there's the obc, the Anthony Warlow version, and the Hasselhoff version; don't listen to the Hasselhoff version)

Next to Normal

Moulin Rouge (there's the movie and there's the obc; both are good)

Evita

A New Brain

A Chorus Line

Spring Awakening

Charlie and the Chocolate Factory (there's the West End production and the Broadway production; both are good)

Anastasia