Fire: Scorpion

Lightning: Raiden

Poison: Reptile

Ice: Sub-Zero

Smaug

Fatalis, Safi'jiiva, Alatreon, Rathalos

Spyro

Poison: Taco Bell, Venom, My ex

Monstrous Nightmare (HTTYD)

If female poison, Medusa

Lightning:Thor

Any wings of fire character

Black colored fire: Alduin