I want the power of the gods to turn away evil undead,.
Why can't undead be turned by Gods who just hate them and whos magic is their kriptonite?
I want smite devils with divine power.
You don't need alignment to do this.
I want holy swords to hum with the power of objective goodness.
Why Goodness and not anti-devilness?
This all can happen without alignment. You can have a paladin in shiny armor fightning undead and devils, without the universe conformation that you are indeed objectively good.
