Brawler

Tavern Brawler.  The brawler is proficient with improvised weapons.  The minimal damage dice for improvised weapons is a d6.  If an improvised weapon the brawler is wielding closely resembles an actual weapon, that weapon gains a +2 bonus to damage rolls.  

Grappler.  The brawler can use a bonus action to attempt to grapple a creature.  At the start of each of its turns, the brawler can deal 1d4 damage to one creature that it is currently grappled by it.        

Brutal Critical.  When the brawler scores a critical hit, it can roll one extra die of damage and add it to the total.  

Forceful Strike (Recharge 5-6).  When the brawler hits a creature with an unarmed strike or improvised weapon, it can deal an extra 1d8 bludgeoning damage to the target.  That creature must make succeed on a DC 13 Strength Saving Throw or be pushed back 10 ft. and knocked prone.  

Strong Attacks.  When the brawler rolls a 1 or a 2 on a damage die for an attack with an unarmed strike or an improvised weapon, it can reroll the die.  If the new roll is a 1 or a 2, the brawler can treat a 1 as a 2.       

Second Wind (1/day).  The brawler can use a bonus action on its turn to regain (1d10 + 2) hit points.  

Multiattack.  The brawler makes two unarmed strikes or two attacks with an improvised weapon.  It can replace one unarmed strike or improvised weapon attack with a Shield Bash.  

Unarmed Strike. Melee Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 3) bludgeoning damage.  

Shield Bash.  Melee Weapon Attack:  +5 to hit, reach 5 ft., one target.  HIt:  5 (1d6 + 2) bludgeoning damage, and the target must succeed on a DC 13 Strength Saving Throw or be pushed back 5 ft.