7. Nathaniel Richards/Kang/Immortus
By now, everyone knows about Kang the Conqueror. However, his real name is technically Nathaniel Richards. He invented the world’s first time machine and eventually became Kang the Conqueror. Of course, in one of his lives, Kang went back to see his younger self to show him all he’d be one day. Nathaniel was so shocked by this that he set out to prevent himself from becoming Kang and to stop others like him, which ultimately led to Richards becoming Iron Lad. Which also sparked the Young Avengers saga.