Batman!!! He is super ingenious. The only superhero DC universe ‘A’ team member without any super powers!! And he kicks everyone’s butt! He is one of the few people who can even keep Superman in check. And, all without powers!! Just ingenuity. You’ve got to admire a guy like that!!
Batman, if he is prepared :-). Of course, you have to worry about someone who keeps a secret plan for how to take out every other super-hero “just in case”. There’s prepared, and then there’s batcrazy.