Base Class: Fighter
A human and a tiefling in half plate lies in wait for the merchants that are on route, carrying precious goods.
A burley half-orc in platemail waits in ambush, as the wanted murderer enters the building he is hiding in. He leaps at the criminal seizing the advantage of surprise, slashing him with his glaive.
Those who become brigands learn to ambush without flaw, ambushing their prey, even when outnumbered, putting their skills to use by becoming highway-men, bounty hunters, or counter-spies.
Brigand's ambush
Beginning at 3rd level, when you choose this archetype, you gain advantage on initiative rolls.
Also at 3rd level, when you hit with a melee weapon attack you can, as a bonus action, make an unarmed strike. If the unarmed strike hits, you can make one weapon attack as a reaction. You can use this feature a number of times equal to half of your proficiency modifier (rounded up)
Might of the bandit
At 15th level, your Strength or Dexterity score (your choice) increases by 2 as well as your constitution score, increasing the maximum by 2 for the scores you have.