I a m r e a d i n g s l o w l y a n d n o t h i n g i s a n y d i f f e r e n t ...

Are all undead inherently evil? That is a tough question to answer. I don't know exactly how I feel about this, but I do think of the sage advice that goes something like, "if thyne hand offends thee, better to chop it off."

So I would say that generally yes, a vampire is inherently evil ... unless it has had its teeth removed. In that case, it may not be evil. And you can call it a "gumpire".