Learsfool: I'm curious whether you include John Adams as a minimalist. I completely agree with you about Glass, but think Adams is terrific, and prefer his music to Reich's. Nixon in China is in particular a masterpiece. Nixon the man will be known centuries from now more as the title character from the opera than as a historical crook statesman. Assuming, that is, that culture survives that long, of which I am not optimistic.
And Stravinsky is definitely not overrated. Nor is Schubert the composer. But Schubert the OP?