The Universal monsters have always been the best. There is no substitute for the big three. Frankenstein, Dracula and the Wolfman. They had a cool version of Frankenstein on the Hulk Agents of Smash animated show. He could fire his hand that was connected to a chain. Throw a long range punch or ensnare an opponent with the chain.
Werewolf by Night and Tomb of Dracula had long successful runs. The Monster of Frankenstein not as successful but he was portrayed in the Legion of the Unliving in the Avengers.
One shots every Halloween would be cool. Legion of Monsters, Legion of the Unliving, Night Shift. I'd buy all three.