Eeveelutions Pokémon Hasn't Used Yet (But Should)

The best new types for Eevee
Eevee's evolutions are one of the most discussed topics for every new Pokémon generation, and a few types could make the best potential Eeveelutions.

Pokémon UNITE - What we know about Sylveon so far - Pokemon Unite

Which Eevee evolutions will you choose to make a team only consisting of Eevee or its evolutions? - Quora

Dual-Type Eeveelution Variants (read comments) : r/pokemon

Pokemon Fan Designs Rock-Type Eeveelution

Kraken's Eeveelutions Binder Update - Collecting - Elite Fourum

My Eeveelution squad is finally done! Evolved the last 150 hour baby this morning ✨ : r/PokemonSleep

Which Eevee evolutions will you choose to make a team only consisting of Eevee or its evolutions? - Quora

Here's the 10th Eeveelution from my project to create one for every unused type, the Normal-type Eeveeon! : r/pokemon

If Ash ever obtained an eeveelution, which one would fit him best? If there isn't one, which type would you use for a new eeveelution that does? - Quora