It’s always fun to propose lists of the “ten best” of something – or the ten worst of something, for that matter. But when it comes to thinking about composers of classical music, there’s a word I like better than “best,” and that word is indispensable . And the number I have in mind isn’t ten , but rather three. Which three composers are indispensable to any account of those who have made the greatest contributions to the living repertoire of classical music? And not as a matter of personal