Barrett from the Start: The Unorthodox Martial God System

Douluo Stories: Humiliate Tang San and Beat Up the Grandmaster

Douluo stories where the protagonist joins Spirit Hall. It'd be great if they could kill Grandmaster and Tang San.

Soul Land, Martial Soul: Book of Life and Death, Barrett, Desolate Heavenly Emperor

Any Well-Known Spear Cultivator Novels? No Betrayal by a Fiancée from the Start

No transmigration, and a modern cultivation novel.

Anything Involving Guns: Gun Spirits, Eye Techniques, Sniper Rifles, and More

Douluo Dalu: The Spirit Hall Saint Son Defeats Tang San's Faction and Ultimately Becomes a God

In Douluo Dalu, the protagonist is Bibi Dong's youngest son, the younger brother of Qian Renxue, and a son of the Spirit Hall's Holy Son from the start. He helps Bibi Dong and Qian Renxue become gods, rules Douluo Dalu, and crushes Tang San's faction.

Douluo Dalu + Battle Through the Heavens + System

Novels Set During a Spiritual Qi Revival, with a Protagonist Who Uses a Gun or a Tang Dao

I'd prefer a heroine who isn't a self-sacrificing do-gooder.

Transmigrate to Soul Land With a Gacha System and Become Invincible

For male-oriented novels, I’d prefer a handsome protagonist.

Douluo Dalu Fanfic: No Sycophancy Toward the Protagonist, with a Darker Tone