Anything that could be a "super power" is good as gold. Even if its completely mundane like the Punisher or Hawkeye.
The IGHSMU is a superhero training and, for lack of a better word, job center for various supers. They aren't the only one, but they are the biggest. High ranking Heroes get to work on independent while those in the lower ranks have to do the IGHSMU contracts to build their ranking. It can claims up to 50% of any monetary or land reward gained by its members, but it doesn't charge fees or entrance costs. Besides Its a bit of a bureaucratic mess, but what large org isn't? Using DnD alinements, its Lawful Neutral with a strong lean to Lawful Good.