The Monarch is the most insecure person on this list. He would kill his henchmen if it made him feel better about himself. If you happen to survive the Monarch's mood swings, Brock Samson could kill you in ways that would make The Punisher cringe.
Let's say neither happens. His plans are idiotic. Every superperson must have a theme, but they rarely come in handy. The Monarch’s goons didn’t know their wings worked until Brock Samson brought it up.
It’s easy to say that you’d work for Bruce Wayne. Once upon a time, he was rich. Anyone working for him had the world’s best technology at their fingertips. Alfred is there for a helping hand, a shoulder to cry on, and tons of useful life lessons. Of course, there’s the training. Batman makes sure that everyone under his watch is prepared for everything.
All of that sounds great, but Batman is a no as well. First, his villains are the worst. no one wants to have Bane or Ra’s al Ghul knocking on their door. They’re merciless. Then there’s the trauma of Riddler, Scarecrow, and Joker.
Second, Batman is a jerk. His stubbornness has halted him as a hero and a person. As a hero, Gotham City has gotten worse. His rogue’s gallery has adapted to him and he’s remained the same. As a person, he’s become his family’s enemy. It got so bad that he implanted Jason Todd with something that froze him in fear. It nearly got him killed.
In short, that’s a no.