True Dragon

The True dragons (Highest tier Divine Monster Spirit) are considered the strongest beings in the world, being equal or superior to a True Demon Lord.

They are beings "perfect as one", especially durable, spiritual life forms, so they have no attachment to their physical bodies, they only take those forms to respond to the desires of religions or similar (or also for convenience)

Originals
Star King Dragon Veldanava /Velda (Angra Mainyu)

Ice Dragon Velzado

Scorch Dragon Velgrynd

Storm Dragon Veldora Tempest

Not official
Milim Nava

Rimuru Tempest