Tirisfal Glades: Captured Scarlet Zealot is on a really long respawn timer
This NPC 1931 gets turned into a ghoul with a spell 3287, then he dies after some minor RP. The corpse despawn fairly quickly, in less than a minute, but then it takes around 10 minutes for the guy to spawn. I've never seen that mentioned anywhere, and considering he is a quest NPC in a busy area, I'm sure this should be a lot lower, especially considering that the corpse despawns very fast.