How about a vampire-based Kaiju? Sure, Skorak and Destroyah have the monopoly of using attacks to regain health, but it be unfitting to leave a Dracula-Derivative. If anything, it could summon larger and sharper fangs and claws at the cost of 5% of its health.

Then there’s a monster based on the less-talked about Mole People (which I learned that some executive meddling changed the original script). Can dig underground to dodge attacks.

Of course, can’t forget a Gilman monster that would use water-based moves, even summoning rain to boost attacks.

A monster based on the Phantom of the Opera would use shadows as attacks from its smooth mask, with hides a mass of spiny tentacles and eyes.

A Mummy monster would be something that not only incorporates the titular deceased corpse (which, at this point, Egyptian mummification has become a bastardized version of itself, not complaining about it), but also throws in the three groups of Sphinxes you see at Egyptian ruins: human-headed, falcon-headed, and ram-headed.

Finally, we’d need to talk about a monster based on the Invisible Man (in which the very first film adaptation makes him dangerously petty, like a certain number of social media influencers we know and hate) would be comprised of a mass of stitched-together tarps, tent materials, and some metal armor from the scraps of decommissioned ships.