Just spitballing a idea here but
How about a Paladin, that doesn't require you to be a Good alignment.
I'm thinking a Dark Paladin doesn't value charisma,
His abilities scale off of strength and constitution.
Thier imbue ability is Force and thier smites are a burst of Negative damage.
Lay on hands scales off of constitution.
Dark Paladin auras are debuffs that spread the "shaken" condition
And his turn undead is a burst of negative energy that on a failed save "fears" the living.
I'm thinking the Dark Paladin tree supports Two Handed fighting and grants "poison, contagion and exhaustion" sla options.
Instead of getting raise dead or ressurection, how about "Finger of Death and Wail of the Banshee".
How about their capstone ability be called "Death Knight".
Toggle on and you are now healed by your Negative energy bursts from your smites and turn undead uses. You are considered undead and gain access to 1 of the pale master forms.
Thoughts ????