Elves from the Broken Sword

The elves of Poul Anderson's The Broken Sword are like the standard elves of D&D to the extent they both share similarities to Tolkien's elves (in the case of Anderson's book, it's because they share the same sources), but are very different in other ways: they are haughty and cruel, more classic faerie-like, invisible to human's without witchsight and vulnerable to iron.

Here's an elven subrace for 5e that is a bit more like Anderson's version than the standard D&D ones:

Ability Score Increase. Your Charisma score increases by 1.

Elf Weapon Training. You have proficiency with the longsword, shortsword, shortbow, and longbow.

Cantrip. You know one cantrip of your choice from the wizard spell list. Charisma is your spellcasting ability for it.

Fleet of Foot. Your base walking speed increases to 35 feet.

Iron Sensitivity. Iron weapons do +1 damage against one. You cannot wear iron weapons or armor, or even touch it without taking 1 point of damage per round.