no but seriously, the roots of half those bands described are hardly metal, but rather springing from hardcore or other genres. (Jesu is a slight technicality, coming from the metal-tinged industrial act Godflesh.)
for that post Neurosis sound my favorite records are Isis - Oceanic, and Cult of Luna - The Beyond...and I'd like to say that the world can do without about 85 % of bands that started playing this style once hydrahead and isis blew up.
one exception however, a great Welsh band called Taint (awesome name)