Karl Benben (founder of Mercedes-Benz).
Watt (it was said in elementary school that he improved the steam engine).
Da Vinci (I heard that this guy can also play with machines, not just draw "Mona Lisa Smile").
However, I always name them after my favorite stars, characters, and movies. For example, the 4 new spear swordsmen I played.
Dark Blade is called "Pluto Rayleigh" (Rayleigh is a famous character in "One Piece", he is also old, gray-haired, good at playing swords, Dark Blade is very similar to him).
The agent is called "James Bond" (Bond, 007, agent, it fits the bill enough).
The battlefield mercenary is named after the star, called "Jason Statham" (those who like watching action movies and "Fast and Furious" 7 and 8 will definitely know him)
Energy Expert is also related to Jason Statham, but it is named after a series of his famous movies, the Fatal Express series of movies, called "The Fatal Express 3".
I am very satisfied with these four names.