MTed, I agree, The Bolero is a masterpiece. The gradual involvement of the whole orchestra and the building intensity and emotion throughout the piece has not been equaled.
You also mention the El Greco nonsense. The erroneous comments apply mostly to his portraits of saints and seldom may be said of his other works. Like many artists, he exaggerated for effect. A "more likely" story is that he painted the saints that way because they would be displayed rather high on walls, but I believe that he was simply striving for a total effect and one that put the saint beyond the common earthly plane.
A genius will innovate; if we don't understand his purpose, we tend to make up just-so stories.