EvansKannon
Honestly the only character I can think of who is basically Anti-Everything is Gilgamesh(Fate) because Gate of Babylon has everything for every occasion plus if he gains the complete Package Thing he would also have Magic Gilgamesh's Caster form is a Grand Candidate after all. And his Archer Form(Fate/Extella) is Arguably the Strongest Character in Fate
I have a suggestion for gacha. Diehauser Belial from Highschool DXD. In the story, he trounced Issei's Cardinal crimson. Also, he is known as the Emperor of rating games and remained 1st for centuries. If we compare him against thor from this story he will wipe the floor only using his physical strength. But the best thing is his Devil magic and clan trait- Worthless- which nullifies everything as long as he understands how that works(which is incredible) and devil magic is intent-based magic so is very powerful with enough training.
In the previous chapter the comments only named characters or items from Video Games, American Comics and Anime. Did I hear someone name the 『Shadow Monarch•Sung Jinwuu』? 'I'm proud of that boy.' Last time I went the Magic route, very useful against the Phoenix. But there are already hints that Hector will become a small deity... Elemental God? Cliche. God of war and fighting? Lots of headlines. Mutant God? Legion is on that road. What if... Hector absorbing 『Loki』is feasible. (Loki's priesthood includes Lies~Stories. Official) Characters with related concepts: 『Re:Creators•Altair』 His ability to bring 'fictional characters' into reality is incredible and his growth rate is just as outrageous. 『Omnicient Reader's Viewpoint•The Oldest Dream』Kim Dokja, the boy who began to dream of a story. The most omniscient but most impotent God. The world is as long-lived as your dreams. 『Lord of Mysteries• Adam』Visionary Path contains terrifying powers that distort reality through thought. With the Sea of Chaos he is able to promote himself to the pseudo Omniscient and Omnipotent God. 『A Certain Magical Index•Kamijou Touma』Imagine Breaker, the power to straighten the world to the original state.