Another One Bites The Dust is not even a Top 30 Queen song.
If you're going to judge a band, do it based on their best stuff, not by a mediocre 3 chord song. 90% of songs written by Mercury or May are better than that one. Deacon was never a great songwriter, although he did write some nice songs (Spread Your Wings, or Best Friend).
And what's wrong with Kansas?? They're a fantastic band.
There's no Dark Side of the Moon really, matter of fact it's all dark.