My first reaction is that yeah, that seems a bit harsh on John Deacon, who was undoubtably an important part of Queen and the Queen sound. But if I had to break it down the same way, (which is weird to do, but this is DTF so maybe not), I'd get similar results. Freddie was huge, larger than life, at least half the reason Queen was Queen. Brian May was next, and saying he was half of "the rest" of what made Queen Queen also sounds about right. So it kinda just comes down to how you divide up the last 25%, and I'd give the edge to Taylor because of his incredible drums and insanely high vocal harmonies. Sorry John, but even in a band of giants, someone has to come up last. He wrote some cool, catchy songs, probably contributed in other ways that I don't know about, but I can point to many more examples from the others.