[Primordial World fantasy + lighthearted comedy + no female lead + evolution + unconventional path to sainthood]
Transmigrating? Fine. Becoming a bacterium in the Primordial World? Who the hell could handle that?
Other transmigrators become immortal scions or inherit the bloodline of a Demon Emperor. He transmigrates as a single-celled organism after Pangu creates the world.
Luckily, he awakens an Evolution System: devour, adapt, mutate, evolve!
From bacteria to blue-green algae, from algae to spirit plants, from spirit plants to demon beasts, then taking human form...
While the Three Pure Ones discuss the Dao, he's evolving flagella. While Nuwa creates humanity, he's growing a third eye.
Tens of millions of years later, the saints ask him about the Dao: “Fellow Daoist, what mighty being are you?”
He smiles faintly. “I am the Ancestor of Evolution.”