I think I am going with a fighter/necromancer hybrid. He won't be a spellcaster per se, but will have some necromantic powers usable X times/day.
Anyone have a good name for such a class? Necromancer and warlock suggests spellcasters and I want something that indicates necromancy + fighter with a shady side.
Blackguard, Duskblade, Illblade, Hexblade, Fellblade, Death Knight, Shadow Knight, Slayer, Reaver, Reapers, Grim Knights, Blood Knight, Sanguinary, Liminal, Warrior on the Threshold, Gatekeeper, Watchman
The last four referencing the warrior standing on the cusp between the material world and the spirit world, serving as a conduit for dark forces of life and death, standing on the metaphorical crossroads / threshold between the worlds of the living and the dead. This could play into the fluff of the class, with warriors being 'blessed' with this half-alive state of awareness after being born with a caul over their face (and unbreathing), and being revived from death's door during their birth. Others might qualify for picking up this class after a near-death experience later in life (which, given the life of an adventurer, is darn near everyone...).
Perhaps the occurence leaves a physical sign on the warrior, marking his brush with the reaper, such as the white eyes or gray-blue pallor of a dead man, or (in the case of those who brushed up against death later in life) visible scars.
Children destined to become Reapers (or whatever) might have an 'unhealthy' fascination with death and life, and might work as butchers or bonecarvers or gravediggers, later in life, or decorate themselves in morbid tattoos or scarifications or items of adornment. Despite these unpleasant associations, many, because of their awareness of life leeching from those around them, might have an incredible sense of empathy, and a desire to stop the flow of life from those around them, instinctively healing hurts, even at the cost of pain to themselves.
Others, not so much, becoming addicted to the sweet rush of stolen life-force surging into their own bodies as hot blood splashes against them from the wounds their reaping blades inflict...