banned for taking an arrow in the knee

banned for using one of those meaningless internet quotes

Banned for taking Ryat's arrow to the knee

Banned because I've been thinking about fantasy a little bit recently, and I don't like how the undead, which are a really cool, interesting area with a lot of stuff in it, are reserved almost entirely for the forces of evil/darkness. So I whipped up a batch of good/holy undead creature types: They don't have hard-and-fast stats because I didn't create them for any particular game system, but who cares?

1. Martyr: This is basically someone very, very holy (a prophet, hero, saint, etc.) who chooses of their own personal volition to use magic to remain alive forever, denying themselves eternal rest to strive for broadly-mandated good causes in the mortal world. These guys are powerful, technically arise as the result of necromancy but only from the bodies of very special willing people, are free-willed, and are really kind of just a good version of the D&D lich.
2. Sentinel (dumb name): Usually a great warrior, wizard, etc, but more importantly someone with close ties to an artifact or tomb, who is brought back from the dead to protect that thing against evildoers. Closest analogue would be the Tolkeinian wight. Although like wights I initially thought of them protecting tombs full of treasure (i.e. staying in basically one unseen place), I see no reason why the couldn't protect a patch of hallowed ground, a particular person, or even something more idea than physical object like a kingdom or cause. Free-willed, but with a very specific purpose. Can either arise spontaneously or be created through necromancy.
3. Undying: Not dissimilar to skeletons or zombies. Really a catch-all for all good-aligned, non-free-willed, necromantically-created undead, so I could see this broken up into a lot of different types. Basically, the point of this is that in some magic systems I could see it not being automatically evil to reanimate dead bodies and make them serve you. Either they're actually the dead person reborn with an outlook on life more existential for having been through the hereafter, bodies inhabited by some kind of good spirit, or just magical constructs like golems that use a dead body as a base (in which case they're kind of icky, but more or less morality-neutral), I don't care.
4. Eternal Footman (Dumb name): These are soldiers or servants who are so loyal and devoted to either a cause or a person that they refuse to break their oaths even after death. Mid-level entities with some free will, but they will always do whatever the object of their devotion commands. Could arise spontaneously or through necromantic creation, but I'd sort of like it to be one or the other, and also to have some measure of preparation be required before death.
5. Avenger: These guys are a little different, mostly because I put so much more time and thought into them. They are either the risen bodies or just incorporeal spirits of good-hearted people who were killed in some particularly horrible or unjust way- wrongfully executed by repressive empires, betrayed by their closest companions, tortured for an exceedingly long time, et cetera. The point is, these souls could never rest peacefully in the afterlife knowing that who or whatever wronged them escaped punishment... so they came back to deliver it. More than any of the others, these are real people with memories, personalities, and relationships all their own. They can only ever arise spontaneously, and although they very much have free will their entire existence is consumed with finding justice for themselves (and also preventing the same fate from befalling others). Their new form is more powerful than they ever were in life, physically and magically, and in fact the more helpless the person was when they were alive the stronger an Avenger they will make. Although they don't age or decay naturally, they would obviously have to be able to be destroyed in combat (otherwise they would ruin whatever game system they were in) and if they manage to find justice and prevent whoever wronged them from hurting anybody else, they simply dissolve into a pile of golden dust and return to the afterlife.

Banned for applauding concepts you wish you'd thought of to scare the crap out of impressionable people who are alone and keep hearing bumps in the night

banned for stealing my quote

banned for LotR does not follow this concept. They're average people with average feelings and reactions.

banned for in Diablo 2, the undead are a primary tool of the Necromancer, a character seeking the banishment of Diablo and misunderstood due to his methods.

These are not the majority, but someone gives the shambling few their due.

Edit: The Crow.

Banned for caw caw!

Banned because crows also have one of the most developed languages aside from humans. 

Banned because, in the wee small hours, I'm sometimes still afraid of the Wicked Witch of the West. Those flying monkeys had real potential as shock troops.

banned for being ready to swat some flies

Banned for crimes against nature. 

Banned because red in tooth and claw was pretty much right on the money.