There were a long list of cynics until about 240 CE. None of them up to the standards of Diogenes.I read reviews about the book "The Gospel According to Dog: The Good News of Ancient Cynicism." They are very different, from good and neutral to negative. I think I'll read it myself and draw my own conclusions. Thanks for the recommendation.
That said Nietzsche is the modern cynic. He's not outlandish except in his ideas that are obsessed with a self perfection, a hardening of the body and mind that nature produces when all comforts are denied. And of course his uncompromising attack on popular doctrine which was labeled nihilism. Obviously a cynic could be labeled a nihilist as they purposely never attach to a set of ideas based on a location, triteness or hidden agendas. Nietzsche is perhaps the greatest writer that ever lived to expose the great lie without proposing an alternative system, he's simply pointing to the truth that most work hard to hide.