I want to be able to kill anyone in the game. Any mods that remove the essential tag from everyone?

just look for it on nexus, i searched "no essential" and found 3 results. it looks like these mods just edit each npc in vanilla to not have the essential flag set, so it will conflict with other mods. Im not sure right off the bat if wrye bash can fix this, so I dont think i would advise using them. Also killing some essentials will break quest and halt your progress.

If you dont care about the incompatibility or quest issues those mods do exactly what you want. The only problem is it wont change any npcs from other mods to non-essential.

edit:

just looked up essential on nexus, http://tesnexus.com/downloads/file.php?id=20509 mod adds a spell you can use on each npc to change their essential status.

There's a line in the Oblivion ini file which allows you to kill all essential NPCs. I can't remember the exacty name of the line, but it's conflictfree (you only risk killing the wrong people effectivly breaking quests, the good thing however is that essential NPCs are still maked as such). Look for "essential" in the ini file, the line is fairly obvious from what I remember.

must be these:
bForceReloadOnEssentialCharacterDeath=1
bEssentialTakeNoDamage=1

lol, thats a much simpler way of going about it.

Thanks, I found the line in the INI.

Those are the ones, yes.