What part of it are you looking for? Do you want another necromancer novel or a dungeons in the real world novel? The S-Classes That I Raised is good.
Sovereign of Judgement <-Going into dungeons is not really a choice, but MC refuses to rest on his laurels like the other groups. Reincarnator <- Not the same world, but all of humanity is going to end up there eventually. Evolution Theory of the Hunter <- So so novel, but the most like Seoul Necromancer for world setting.
Omniscient Reader's viewpoint although there are no dungeons, it has similar setting one way or another. u can check the reviews and it's upto u.