It's a sort of modern-day witchcraft that makes it possible for the studio-work from 30 or so years ago to appear in one's ears at the press of a button and sound as good as ever (within the limits of one's ability to perceive hi-fi sound).
In the case of Queen, you have a band with a distinctive sound, yet a total lack of samey-ness in their music. In my case this morning, I've got "A Day At The Races" on. It's one of my favourite Queen albums. It starts with the riff-heavy "Tie Your Mother Down". When you want to drown out distractions, there's nothing greater than Brian May giving it some on his electric fireplace.
Sure, as a band they may well have played some dodgy gigs, and been either politically unsound, or unaware. I think one can divorce someone's artistic output from their politics/behaviour. In the same way, I'm pretty sure that Rolf Harris can drawn a nice picture.
That is all.