A very simple mod that raises the magnitude of the Dead Thrall spell to 100 and removes the check from the ReanimateThrallFFAimed effect that prevented raising creatures and NPCs with the appropriate keyword. Putting the mod at the bottom of your load order is recommended, to ensure it is not overridden by mods that change loads of spells.

Keep in mind that resurrecting silly things may have unexpected results.

Feel free to modify and redistribute wherever and however, no credit or permission necessary.