Andechs

Action Surge

Dueling: When you are wielding a melee weapon in one hand and no other weapons, you gain a +2 bonus to damage rolls with that weapon.

Andechian Critical. Andechs' weapon attacks score a critical hit on a roll of a 19 or 20.

Remarkable Athlete: Andechs can add half his proficiency bonus (rounded up) to any Strength, Dexterity, or Constitution check he makes that doesnt already use his proficiency bonus. In addition, when he makes a running long jump, the distance he can cover increases by a number of feet equal to his strength modifier.

Additional Fighting Style: Great Weapon Fighting: When you roll a 1 or 2 on a damage die for an attack you make with a melee weapon that you are wielding with two hands, you can reroll the die and must use the new roll, even if the new roll is a 1 or a 2. The weapon must have the two-handed or versatile property for you to gain this benefit.

Indomitable: Andechs can reroll a saving throw that he fails, if done he must use the new roll, he can use this feature twice, and does not regain any uses until he finishes a long rest.

Slasher: Once per turn when you deal damage to a creature with slashing damage you can reduce its movement speed by 10ft. Additionally, when you score a critical hit, you grievously wound the creature, until the start of your next turn the creature has disadvantage on all attack rolls.

Extra Attack. Andechs can make up to 3 attacks on his turn.

Action Melee Attack. Melee Weapon Attack: +11 to hit, reach 5 ft., 1 target. Hit: 14 (2d6 + 1d4 Radiant + 6) Slashing damage. 

Second Wind: Andechs can use a bonus action to regain hit points equal to 1d10 + 14, after using this feature you must finish a short or long rest before you can use it again.