Queen - Flash Gordon O.S. (1980)
This was Queen's ninth album, and it features mainly instrumental pieces, the exceptions being the single 'Flash' ("Flash's Theme" on the album) and 'The Hero'.
It's a mixture of movie dialogue, guitar rock and synth-rock, with some small portions of the orchestral score (by Howard Blake).
The album reached no.10 in the UK and no.23 in the US. Here's Flash's Theme: