Need some villains?

So in my campaign (pirate themed) there are 4 main groups: players + alliances(not happened yet), antagonist (cult of the anti kraken), merchant backed group, and mercenary type group.

also some background information: problems are happening with the sea, the kraken is blamed however the trapped eldrich being is causing it (kraken is trying to stop it from escaping).

Long story short I need some ideas for leaders of the cult of the anti-kraken. Looking for race, class, notable choices or a monster

Fathomless warlock comes to mind. Or seas Druid or tempest cleric. Species sea elf, triton, water genasi, tortle.

Those are the obvious ones. But you could also go the opposite direction, like a dwarf artificer because the plan involves building a contraption to keep the kraken in. Or some kind of fighter or paladin, because the anti kraken doesn’t need help with the magic end, they need someone to lead their army. Or a bard because it needs a smooth talker to be its emissary in the world. Species can be whatever fits in your world’s lore.