Centaurion

Charge. If the centaurion moves at least 30 feet straight toward a target and then hits it with a longspear attack on the same turn, the target takes an extra 10 (3d6) piercing damage.

Polearm Master. You can keep your enemies at bay with reach weapons. You gain the following benefits:

When you take the Attack action and attack with only a reach weapon, you can use a bonus action to make a melee attack with the opposite end of the weapon. This attack uses the same ability modifier as the primary weapon. The weapon's damage die for this attack is a d4, and the attack deals bludgeoning damage. This attack uses the same ability modifier as the primary attack.

While you are wielding a reach weapon, other creatures provoke an opportunity attack from you when they enter the reach you have with that weapon.

Multiattack. The centaur makes two attacks: one with its longspear and one with its hooves or two with its longsword/longbow.

Longspear. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 9 (1d10 + 4) piercing damage. Range 20/60.

Hooves. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) bludgeoning damage.

Longsword. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 9 (1d8 + 4) slashing damage. Versatile (1d10)

or

Longbow. Ranged Weapon Attack: +4 to hit, range 150/600 ft., one target. Hit: 6 (1d8 + 2) piercing damage.