Can you name any "plainclothes" super heroes?

Anyone can recognize Batman, Superman, or many of the X-Men by their iconic costumes. Some of the other heroes, like The Hulk or Lobo, don’t necessarily wear uniforms but usually have some other easily identifiable feature (green skin, wild hair).

Can you name any normal looking superheroes who fight crime in their street clothes?

I’m discounting the “Heroes” TV series here, I’m looking more in the world of comic books.