Fire: Scorpion

Lightning: Raiden

Poison: Reptile

Ice: Sub-Zero

Smaug

Fire male: Trogdoor

Male fire: Trogdoor

Fatalis (from monster hunter)

Spyro

vortex for fire wyvern

Kazmuda or Inferno

Poison: Taco Bell, Venom, My ex

If female poison, Medusa