Can't choose an order but my favourites are-
The Rocky Horror picture show
Little shop of horrors
Tommy
Mad Monster party
Phantom of the Paradise
Blues brothers
Wizard of Oz
And Jeff Waynes War of the Worlds needs a mention even though there isn't a proper film from the musical unfortunately.
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MIKE: I've got it! Peter Cushing! We've got to drive a stake through his heart!
VYVYAN: Great! I'll get the car!
NEIL: I'll get a cushion.