I always liked Hydra more than THEM/AIM (though MODOK almost overcomes the beekeeper thing) or the Maggia.
But the Secret Empire was pretty cool, with their hoods that had domino masks, and the Nixon thing and all. Though, as an offshoot of Hydra, they don’t really count.
Plus, Hydra has the awesome H uniform front. But then again, they were the bad guys in the first comic I remember so maybe they have an unfair advantage.
Nah, Hydra are the best.