Valkyrie

Divine Smite. When Valkyrie hits a creature with a melee weapon attack, She can expend one spell slot to deal radiant damage to the target, in addition to the weapon’s damage. The extra damage is 2d8 for a 1st-level spell slot, plus 1d8 for each spell level higher than 1st, to a maximum of 5d8. The damage increases by 1d8 if the target is an undead or a fiend, to a maximum of 6d8

Aura of Protection. Allies within 30 ft of Valkyrie gain a +5 bonus on saving throws.

Aura of Courage. Allies within 30 ft of Valkyrie can't be frightened.

Lay On Hands. Valkyrie has a pool of healing power that replenishes after a long rest. She has 50 healing points. As an action, she can touch one creature and restore up to 50 hit points. This has no effect on undead of constructs.

Spellcasting. Valkyrie is a 10-level spellcaster. Her spellcasting ability is Charisma (spell save DC 15, +8 to hit with spell attacks). Valkyrie has the following Paladin spells prepared:
Cantrips (at will): Light, Spare the Dying, Word of Radiance

1st level (4 slots): Bless, Compelled Duel, Cure Wounds, Heroism

2nd level (3 slots): Aid, Lesser Restoration, Zone of Truth

3rd level (2 slots): Aura of Vitality, Blinding Smite

Shield Master. When Valkyrie succeeds on a dexterity throw against a damaging effect, she takes no damage instead of half damage, ducking behind her shield.

Multiattack. Valkyrie makes two longsword attacks.

Longsword. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 9 (1 d8 + 5) slashing damage, or 10 (1d10 + 5) slashing damage if used with two hands.

Shield Bash. Melee or Ranged Weapon Attack: +9 to hit, reach 5 ft., or range 30/120 ft, one creature. Hit: 7 (1d4 + 5) bludgeoning damage. If the target is Large or smaller, it must succeed on a DC 14 Strength saving throw or be knocked prone.

Turn the Unholy. Valkyrie presents her holy symbol and speaks a prayer censuring fiends and undead, using her Channel Divinity. Each fiend or undead that can see or hear Valkyrie within 30 feet of her must make a DC 15 Wisdom saving throw. If the creature fails its saving throw, it is turned for 1 minute or until it takes damage.

A turned creature must spend its turns trying to move as far away from you as it can, and it can’t willingly move to a space within 30 feet of you. It also can’t take reactions. For its action, it can use only the Dash action or try to escape from an effect that prevents it from moving. If there’s nowhere to move, the creature can use the Dodge action.

Radiant Soul (once per long rest). Valkyrie unleashes the divine energy within herself, causing her eyes to glimmer and two luminous, incorporeal wings to sprout from her back. The transformation lasts for 1 minute or until she ends it as a bonus action. During it, she has a flying speed of 30 feet, and once on each of her turns, she can deal extra 10 radiant damage to one target when she deals damage to it with an attack or a spell. 

Shield. When a creature makes an attack against an ally, Valkyrie grants a +2 bonus to the ally's AC if Valkyrie is within 5 feet of the ally.