Which main characters in novels were invincible in the Primordial World?

I recommend the two novels,"I am the Invincible Eldest Senior Brother" and "I Have a Little Kingdom in the Wilderness." The protagonist of "I am the Invincible Eldest Senior Brother", Su Qingyun, had transmigrated to become the sect's Eldest Senior Brother and was hailed as a peerless genius. Although he had the special effect of borrowing magic treasures, he could summon mighty people from the Primordial World after awakening the Immortal Seeking System. Three Pure Pangu, North Pole Emperor Ziwei, South Pole Emperor Chang Sheng, and the others were all under his command. In the world of the primeval world, the main character of "I Have a Little Kingdom", Chu Haoxuan, was only the size of a finger even though he was a hundred thousand feet tall. In the fantasy world of reality, he became awesome! I hope you like my recommendation. Muah ~