Path of the Brawler

(from u/StarSailGames on reddit - thanks!)

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Barbarians that follow this path believe that even relying on conventional weapons is a sign of weakness. They prefer to overcome their foes using nothing but their bare hands and incredible grappling prowess. These barbarians can pin down the mightiest of foes and even throw their enemies across the battlefield.

Unarmed Fury

Starting when you choose this path at 3rd level, you gain the Unarmed Fighting fighting style, and you can add your Rage damage to your unarmed attacks and to the extra damage against grappled targets granted by Unarmed Fighting. 

Additionally, you may use your Reckless Attack feature when making unarmed attacks, and after making a successful unarmed strike against a creature, you may attempt to grapple it as a bonus action.

Grapple attempts are now treated as attacks for the purposes of maintaining your rage.

Unarmed Fighting

Your unarmed strikes can deal bludgeoning damage equal to 1d6 + your Strength modifier on a hit. If you aren't wielding any weapons or a shield when you make the attack roll, the d6 becomes a d8. At the start of each of your turns, you can deal 1d4 bludgeoning damage to one creature grappled by you.

Rage Infused Fists

Starting at 6th level, your unarmed attacks and damage you do as a result of grappling or throwing creatures counts as magical for the purposes of overcoming damage reduction. You may also grapple incorporeal creatures that would otherwise be immune to the grappled condition.

Foe Thrower

At 6th level, if you are not prone, you may attempt to throw a creature you are grappling. In place of an unarmed strike, you can make an opposed grapple check against a creature you are grappling. If you succeed on this check, you can throw the creature a number of feet equal to 5 times your Strength modifier.

For every size category larger than you the creature is, reduce the maximum range of the throw by 5 feet. For every size category smaller than you, increase the maximum range by 5 feet.

If the creature hits a solid surface, it takes 1d10 + your Strength modifier bludgeoning damage, and lands prone. If you don't throw the creature outside the reach of your unarmed strikes, you may maintain your grapple, but throw yourself prone as you body slam the creature into the ground. If the thrown creature would hit another creature, the creature that would be hit must make a Dexterity saving throw with a DC equal to 10 + your proficiency modifier + your Strength modifier. On a failed save, the creature being bit takes bludgeoning damage equal to your Strength modifier and is knocked prone unless it is at least two size categories larger than the creature it was struck with. On a successful save, it takes no damage and is not knocked prone.

If you are raging, apply rage damage to any damage done using this ability

Colossus Climber

Starting at 10th level, if you are grappling no other creatures, you may attempt to grapple creatures more than one size larger than you. While grappling a creature this way, you may not grapple any other creatures.

A creature grappled this way has its movement speed halved rather than reduced to 0, and when it moves, you move along with it. If you attempt to move the creature on your turn, you must win an opposed Strength check against it/ You may move into any space the grappled create occupies using your climb speed.

While you are occupying the creature's space, it had disadvantage on attack rolls against you.

Unstoppable Grappler

At 14th level, if you are grappling only one creature no more than one size class larger than you, you may make another grapple attempt against it. If you succeed, the creature is restrained.

A creature restrained this way has disadvantage on checks to shove you and on saves against your Foe Thrower feature, and if it attempts to use teleportation or interplanar travel to escape your grapple, it must first make a Charisma saving throw with a DC equal to 10 + your proficiency modifier + your Strength modifier. On a success, the creature can't escape and wastes the use of the spell of effect.

Making any other grapple checks ends the restrained condition.