Britten was one of those composers who was so talented he made it look easy. But listen to his
Missa Brevis and you will discover how truly great he was. Also, English composers have tended to be underrated, William Boyce is quite a good composer. So is Granville Bantock. If Elgar's violin concerto is not a masterpiece, no such thing exists. Then there's Vaughan Williams. And I could go on.