Path of the Yokozuna

While most monastic traditions rely on speed, elegance, grace and wisdom.  You are an entertainer.  Your body isn't built for aesthetics, it is built for one of the most noble of combat sports.  An armour of muscle, covered in an even thicker armour of fat.  While most people might see you as unhealthy, obese and the likes you are almost the exact opposite, a specimen at the peak of physical performance.

 

Punishing palm strikes

Your unarmed strikes can deal bludgeoning
damage equal to 1d6 + your Strength modifier. If you strike with two free hands, the d6 becomes a
d8.
When you successfully start a grapple, you can
deal 1d4 bludgeoning damage to the grappled
creature. Until the grapple ends, you can also
deal this damage to the creature whenever you
hit it with a melee attack.

Immovable Object

Beginning at 6th level,  You are considered one Suze larger for the purpose of grappling, and have no upper size limit for grapples opponents Additionally, your grip has become infused with your fighting spirit.  Your unarmed strikes are considered magical for the purposes of ignoring damage resistance.

Unstoppable Force

At 10th level, the power of your palm strikes has grown so that most enemies cannot withstand it without recoiling backward.  When you perform an attack roll, you may optionally perform the shove action as part of the unarmed attack.  After you have confirmed the attack and damage you can then force the enemy to make aasyr save  DC 8+Prof+str.  If they fail, they are forced 5ft backward, and you can choose to advance 5ft forwards.

Body Slam

At 14th level you gain the ability to down an opponent with a devastating body slam.

When you maintain a grapple with an opponent over two rounds, you can choose to sacrifice one of your attack actions to perform a powerful bodyslam.

eg.
Round 1, grapple opponent
Round 2:  Body Slam

Perform a grapple check against the already grappled opponent.  If you succeed, the opponent is lifted off their feet and slammed into the ground, with the full force of your bodyweight behind it.  Both you and the opponent are left prone and without the grappled state, and the opponent must then make a con save. (DC10 + proficiency + STR mod)

On a failed save they take 10d10 damage and are stunned until the end of their next turn.
On a successful save they take half as much damage and are not stunned.