Philosophical underdogs, unfashionable philosophers, and the underrated (Update: DEAD ONLY)

In light of the spirited contributions to my request for philosophical underdogs, I am now inclined to distinguish among:

1. Those philosophers who are out of fashion, but never unread by specialists; where return to fashion seems plausible. (Think of the way Hegel was unread in the English speaking world 30 years ago and Whitehead now; maybe Santayana and Marx also fits this, too.)

2. The philosophical underdogs (unread, beleaguered and downtrodden, struggling against more powerful forces in life and after): Hypatia, Marmontel, Bruno, Reinach, mayvbe even Schopenhauer (although certainly far more widely read than any of these), etc.

3. The underrated: I am thinking of Bolzano, Adam Smith, Scheler, Herder, Maimon, Bradley, etc-folk with important living partisans, but somehow not quite canonical.