Path of the Dreadnought

think the Juggernaut from Marvel, but in more detail.

Ironclad Fury

Starting when you take this path at 3rd level, your rage burns hotter when contained within cold steel. You gain the following benefits:

• Proficiency in heavy armor.
• Wearing heavy armor does not prevent you from gaining any benefits from the Rage ability.
• While wearing heavy armor, you have advantage on all saving throws to resist being forcibly moved or knocked prone. Additionally, if you are forced to make such a saving throw while not raging, you may expend your reaction to enter your Rage and automatically succeed on the saving throw.

Brutalis Assault

Starting when you take this path at 3rd level, your bulk itself is a weapon to be used. While raging, if you are wearing heavy armor, you can use a bonus action during your move to pass through the space of a creature one size larger than yourself or smaller. That creature must succeed a Strength saving throws (DC 8 + your Strength bonus + your proficiency bonus) or be knocked prone and take bludgeoning damage equal to 1d10 + your Strength modifier.

Leviathan's Might

Starting at 6th level, your resilience makes foes regret striking you. While wearing heavy armor, whenever an enemy hits you with a melee attack, they take force damage equal to your Constitution modifier. Starting at 14th level, they take damage equal to your Barbarian level instead.

Redemptor's Bulwark

Starting at 10th level, your muscle memory has improved your reaction time. You gain proficiency in Dexterity saving throws. Additionally, whenever an enemy misses you with a melee attack, you gain temporary hit points equal to your Barbarian level. If that attack had advantage, you may use your reaction to push them back 10 feet, where they land prone.

Unstoppable, Immovable

Starting at 14th level, you are both hammer and anvil, and you shape the battlefield with your armored fist. While raging, if you are wearing heavy armor, you gain the following benefits:

• You gain advantage on all saving throws.
• Attack rolls against you are made with disadvantage.
• Your attack rolls are made with advantage.
• When you use your Brutalis Assault ability, you can pass through the spaces of any number of creatures one size larger than yourself or smaller. Those creatures must each succeed a Strength saving throw at disadvantage, and the damage increases to 3d10 + your Strength modifier on a failed save, or half as much on a successful one.