I have been thinking about this and actually there are probably 3 rules:
1) Let's say it has to be 95% single artist...there's always a random scene with some other music.
2) NO "BAND" MOVIES i.e. Yellow Submarine, the Wall, Quadrophenia, etc.
3) No Soundtrack scores for silent films.
I have 2 that I like a lot.
#1 is Scotland PA. It's almost entirely Bad Company. Excellent. (@Dallas and @Shootymane
, you should like this because it's MacBeth...as a 70's fast food restaurant)
#2 is Maximum Overdrive. Not AC/DC's greatest work, but it is definitely "of the era" and I will ALWAYS have a soft spot in my tired, old heart for that.