Alexandros Eurysthis

Inspiring Presence. Friendly creatures within 10 feet of the Paladin get +3 to saving throws , and are cannot be frightened or charmed. Additionally, Alexandros and all creatures friendly to him in the within 10 feet have advantage on saving throws against spells and other magical effects.

Spellcasting. Alexandros Eurysthis is an 11th-level spellcaster. His spellcasting ability is Charisma (spell save DC 16, +8 to hit with spell attacks). Alexandros has following Paladin spells prepared:
Cantrips (at will): Light
1st level (4 slots): Command, Compelled Duel, Thunderous Smite, Searing Smite, Divine Favor, Bless
2nd level (3 slots): Warding Bond Zone of Truth, Lesser Restoration, Magic Weapon, Protection from Poison
3rd level (3 slots): Aura of Vitality, Spirit Guardians, Branding Smite, Crusader's Mantle, Dispel Magic

Multiattack. Alexandros makes two Holy Avenger attacks.

Holy Avenger. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 18 (2d6 + 10) piercing or slashing damage. 

Smite. Alexandros uses a spell slot to deal an additional 15 (3d8) radiant damage with a 1st level slot, 20 (4d8) on a second level, or 25 (5d8) on a 3rd level slot on a successful attack.

Radiant Consumption. (1/day) Alexandros allows the radiant energy himself to burst forth. For 1 minute he sheds bright light in a 10-foot radius and dim light for an additional 10 feet, and at the end of each of his turns, he and each creature within 10 feet of him take 6 radiant damage level. In addition, once on each of his turns, he can deal 11 extra radiant damage to one target when he deals damage to it with an attack or a spell. 

Divine Sense. Detects undead, fiends, and celestials, and places or objects under the effect of Consecrate or Desecrate spells in a 60 foot area.

Healing Touch. (3/day) Alexandros touches another creature, the create regains 22 (4d8+2) hit points, and is freed from any nonmagical disease, poison, or deafness.

Champion Challenge.  (1/day) As a bonus action, you issue a challenge that compels other creatures to do battle with you. Each creature of your choice that you can see within 30 feet of you must make a Wisdom saving throw. On a failed save, a creature can't willingly move more than 30 feet away from you. This effect ends on the creature if you are incapacitated or die or if the creature is more than 30 feet away from you.

Turn the Tide. (1/day) As a bonus action, you can bolster injured creatures with your Channel Divinity. Each creature of your choice that can hear you within 30 feet of you regains hit points equal to 1d6 + your Charisma modifier (minimum of 1) if it has no more than half of its hit points.