Pummeler

Unarmed Attacks focus 

Mighty Fists

When you choose this Archetype at 3rd level, your unarmed attacks deal 1d6+ Strength Modifier in damage. this die increases at 8th, 13th, and 18th level. Any barbarian abilities that affect weapons affect your unarmed strike as well

Assault and Battery

At 3rd level, when you take the attack action while in a rage, you may make an additional attack as a bonus action.

Brutal Strikes

At 6th level, your unarmed strikes count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage.

 

Fearless Assault

At 10th level, you become immune to the frightened condition and may move an additional 5 feet a round.

Body of Stone

At 14th level, you become immune to external movement effects (shoved, knocked down). In addition, you deal double damage to inanimate objects when attacking with your unarmed strike, and striking such an object does not harm you (you wont hurt yourself by punching a stone wall)