Claymore, Kiseijuu: Sei no Kakuritsu Recommendations
Well,these both anime has a creatures seems as a normal human but actually they're a monster that disguise as a human (Yoma in Claymore and Parasyte in Kiseijuu). (sorry, bad english)
And then, the MC in these both series are a half-human and half-monster which in Claymore some people are like that too.
Both series are have a Violence, Gore, and Horror inside which Claymore is most likely very very darker and more gore than Kiseijuu ..
Yeah, if you like the one,you will like the others ...
the threat that humanity face "yoma" and "parasyte" . I really dont know why Isee these two very similiar specially when the hero of the story posses the same power of the threat he or she are facing . if you liked claymore I'm sure you will like this one too