I have a long affection for gravediggers. I played a gravedigger in a larp for around a decade, and I have been a fan of them ever since. I have written D&D stuff around them before. I am also a fan of Death as being seen as a good thing. Too often we treat death like a villain and that is not a healthy way to look at things. I am not saying we should all go out and embrace our inner goth, but anyone who has cared for terminal patients or a large number of other medical condition can tell you that sometimes death is a mercy.
With that in mind, I give you the Grave Knights, those paladins who follow the Oath of the Grave.