In this I will disclose my two favorite personal original character builds.

I. Knight-Paladin/Scourge of The Undead (Note: You MUST have Dawnguard to get the full effect of this build.)

Primary Skills: Block; Heavy Armor; One-Handed; Restoration
Secondary Skills: Crafting; Enchanting

Use: Well basically you are made for fighting the undead, you should use maces in one hand, and a shield in the other for heavy hits, and blocking. The reason Dawnguard is needed for is the new restoration vs. undead spells that will be very useful while low on health or stamina.

II. Shade/Archer-Illusionist

Primary Skills: Sneak; Archery; Illusion; Light Armor
Secondary Skills: Your Choice

Use: Well it is pretty self explanatory, you can use Illusion spells to cause chaos and then Muffle or Turn yourself invisible and then use your sneak, archery to pick off your enemies.

Well. . . Thanks

I have a similar paladin class only he uses swords axes the crossbow alteration restoration heavy armor and block he is pretty Bau5 against undead.
He uses vampire bane, close wounds and stone flesh.