Knight Templar

Some fighters take it upon themselves to carry the name of Goodness in the world. Unlike war clerics, they do not carry the name of one God to the exclusion of others, and unlike Paladins, they swear no oath beyond slaying evil when they find it. These are the Knights Templar

Smiting Critical

Beginning when you choose this archetype at 3rd level, when you land a critical hit, your add a number of d4s as radiant damage to the damage roll equal to your charisma modifier. (ie: if you have charisma 16 [+3] you deal an additional 3d4 radiant damage)

At 15th level, they become d6s.

Paragon of Zealotry

Starting at 7th level, your zealotry is clear to all who see you. It is inspiring to those of the same faith as you, giving you advantage on persuasion checks against them. To all others, however, it is terrifying, giving you advantage on intimidation checks against them.

Divine Shield

At 10th level, your faith manifests itself as a ward against harm.

You can add half of your charisma modifier to your armor class and saving throws against effects from spells cast by evil-aligned creatures.

Commanding Aura

Starting at 15th level, you radiate the will of your chosen diety. 

All creatures that begin their turn within 30ft of you must make a wisdom saving throw (DC 8 plus half of your fighter level, rounding down) If they fail, they affected by a version of the compelled duel spell that only ends when they get further than 30ft away from you if you attack a different creature.

Untouchable Paragon

At 18th level, you exude divine will to such an extent, creatures of darkness and ill-intent find it difficult to even attempt to harm you.

All evil-aligned creatures have disadvantage on all attack rolls against you.