I tend to agree, still there are some male Schubert gems out there.
Although I don`t appreciate Fischer-Diskau a lot, there is a 80`s recording with Alfred Brendel of "Schwanengesang" - he is in a rather desolte shape (his wife dies recently) and his broken voice is a perfect match for this Schubert song collection .... Matthias Goerne has an excellent Schubert Lied project on Harmonia Mundi with the crown jewel being the first release with Elisabeth Leonskaja (I`ve mentioned the disc here a couple of days ago) .... Werner Güra had an outstanding "Schwanengesang" on Harmonia Mundi (feat. the impeccable pianism of Christoph Berner) .... and regarding the Hyperion Schubert Series, Matthias Goerne "Winterreise" and Peter Schreier are strongly recommended .....