There seems to be an argument about who is the greatest philosopher of the 20th century. That would imply that 20th century philosophy had much to say.
However my suggestion is Leonard Nelson of the Kant Fries School. [His ideas are explained in plain English by Dr Kelley Ross on his Friesian.com site].
The reason is that Dr. Ross tends to combine a few admirable things. One is the rigor of the analytic school-and yet not be caught in their triviality. Two is deeply human concerns--that very things that were of great interest to Nietzsche. Third is that odd fact that philosophical profundity and political common sense usually so not come together, yet in Kelley Ross they do.
