Although F-D developed a sort of 'barking' style later in his career, there's no denying that he probably contributed more to the art of lieder than anybody. Also, as far as I can tell, nobody has surpassed him in Busoni's "Doktor Faust". Try the live Adrian Boult version on the LPO's own label, which is greatly truncated. In spite of that fact, F-D. is simply outrageous.