I hate to burst your bubble but you are incorrect on thrown weapons and Paladin Smites.
Melee or Ranged. A weapon is classified as either Melee or Ranged. A Melee weapon is used to attack a target within 5 feet, whereas a Ranged weapon is used to attack at a greater distance.
The Thrown property turns a melee weapon into a ranged attack with a different available attack stat:
Thrown
If a weapon has the Thrown property, you can throw the weapon to make a ranged attack, and you can draw that weapon as part of the attack. If the weapon is a Melee weapon, use the same ability modifier for the attack and damage rolls that you use for a melee attack with that weapon.
Basically it is no longer a melee weapon if you throw it or the target is farther than 5 feet from you.