Guardian

A bulwark focuses on being the wall that enemies break against. They protect their allies by being a heavily armoured barrier that enemies can't get through.

Level 3: Heavy guardian

You gain 2 AC but lose 5 ft of movement speed while wearing heavy armour and carrying a shield. 

Level 3: Taunt

You can use a bonus action to taunt an enemy, forcing them to make a DC(8+CHA+PB) wisdom save. If they fail, they gain +2 damage for attacks but are forced to only target you, they can repeat this save at the end of each of their turns.

Level 7: Body block

As a reaction when an ally becomes the target of an attack within ten feet of you, you can throw yourself into the blow, granting the enemy advantage and becoming the target of the attack. if the enemy misses, your ally can make an attack or cast a cantrip.

Level 10: Adamantine body

You cannot be critically hit, and you have resistance to non magical bludgeoning, piercing, and slashing damage.

Level 15: Ward

You designate an ally as a ward, While this ally is within 30 ft you can use body block As if they were five feet away, enemies gain disadvantage on your taunt, and you take half of all damage dealt instead of them.

Level 18: Undying protector

You become immune to non magical damage and resistant to magical bludgeoning, piercing, and slashing dmg, you regenerate 1D6 hit points at the end of your turn for every time you've taken damage, You have advantage on death saves and treat an 18-20 as a 20, and your taunt save becomes a DC(10+Con+Cha+PB) Charisma save.