Scoundrel

You've honed all your worst instincts, becoming a thoroughly odious and frustratingly effective mass of unscrupulous muscle. Many bandits, bodyguards, and loan sharks follow this archetype, selling their unsubtle services to the highest bidder and then robbing the runner-up.

Bully

Starting at 3rd level, you're at your most dangerous when you're the biggest, meanest threat in the room, a tautology you embrace as ingenious modus operandi. You can use the bonus action granted by your Cunning Action to attempt to shove a creature. In addition, you don't need advantage on the attack roll to use your Sneak Attack against a creature if the creature is frightened of you or at least one size smaller than you. All the other rules for Sneak Attack still apply to you.

Crude Methods

Starting at 3rd level, you've learned there's nothing more painful than a well-placed smack from a big brute wielding and wearing something large and metal. You gain proficiency with medium armor. You can deal Sneak Attack damage with any simple melee weapon that deals bludgeoning damage, not just finesse and ranged weapons.

Knifepoint Negotiations

Also at 3rd level, you've found that naked steel flashes brighter than a smile when you're asking for a favor very nicely. When you make a Charisma (Intimidation) check while brandishing a weapon, you gain a bonus to the roll equal to your Strength modifier.

Meat Shield

Starting at 9th level, it's everybody's problem when you get hurt, especially bystanders within reach. When you use your Uncanny Dodge feature to halve an attack's damage against you, you can choose one creature you are grappling other than the attacker. That creature takes damage of the same type (your choice if the attack has multiple damage types) equal to your level in this class.

Knockout Blow

Starting at 13th level, your enemies see stars when you smack them really hard with blunt objects. When you deal Sneak Attack damage to a creature with a weapon that deals bludgeoning damage, you can force the creature to make a Constitution saving throw (DC = 8 + your proficiency bonus + your Strength modifier). On a failed save, the creature is stunned until the end of your next turn.

You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

Stay Down

Starting at 17th level, you know where to hit your victims to keep them on the ground once you've the better of them. When you deal Sneak Attack damage to a prone creature, that creature's speed becomes 0 until the end of its next turn.