I know Jeff Bezos is considered the richest known person but there is a lot of hidden wealth in the world.
I've heard the following people may actually be trillionaires:
Putin
Oil Saudis
Rothschild family
No one can know who is the richest person sir as you aid they are hidden and no one can know who the exactly richer in the whole world. But you are correct you mention some of the richest in the world. But they so many people are richest.