There are two, Poseidon and Tang San.

1. Poseidon

The first-level god Poseidon in Douluo God Realm, masters the super artifact Poseidon Trident. He was originally a sea soul master in Douluo Continent. In one thousand and one years, he unified the oceans and became the God of the Sea, and ascended to the Douluo God Realm.

Twenty thousand years later, after Tang San completed the Ninth Poseidon Examination, he passed his Poseidon status to Tang San. ?

2. Tang San

One of the first Shrek Seven Monsters, the third in age, referred to as Xiao San, nicknamed Thousand Hands Shura, Douluo title "Thousand Hands", Hao The son of Heavenly Douluo Tang Hao and the 100,000-year-old Blue Silver Emperor Ah Yin, he inherited the twin titles of Poseidon and Shura God after becoming a god.

Poseidon inheritance:

In Tang San’s tens of thousands of years of cultivation, Poseidon had already surpassed the original first-level gods and reached the realm of god king. Even so, Tang San had many times wanted to pass the Seagod position to Huo Yuhao, Tang Wulin and others, but in the end nothing happened.

Huo Yuhao has inherited the status of the God of Emotions and has cultivated it to the level of the God King. Huo Yuhao once admitted in the Legend of Tang Sect Heroes that he could share the responsibilities of his father-in-law Tang San, but he did not want to become the leader of the Douluo God Realm.

Moreover, Tang San also thought about letting Huo Yuhao inherit the God of Destruction's status, but Huo Yuhao and the God of Destruction's status were not suitable, so Tang San finally gave up.