CLASS/SUB-CLASS/MISC. ABILITIES
Feat
Polearm Master (PHB 165): Use a bonus action to take an additional attack with the opposite end of a glaive, halberd, or quarterstaff. This ttack uses a d4 damage die, but modifiers do apply. Enemies entering within 10' offer you an opportunity of attack.
Half-orc
Darkvision: 60'
Relentless Endurance (PHB 41): When reduced to zero but not killed outright, you can drop to 1 HP instead once per long rest.
Savage Attacks (PHB 41): When you crit with a melee weapon, roll an additional damage die.
Fighter
Fighting Style - Great Weapon Fighting (PHB 72): Re-roll 1s or 2s on damage dice, but you must keep the second result.
Second Wind: (PHB 72): Use your bonus action to gain HP equal to 1d10 + fighter level, once per short or long rest.
Action Surge: (PHB 72): Gain an additional action once per long or short rest.
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Champion
Improved Critical (PHB 72): Crit on a natural 19 or 20.
Pirate
Bad Reputation (PHB 139): You can get away with minor criminal offenses: shine-and-dine, light vandalism or destruction of property, etc.