 If you liked Overlord |  ...then you might like Kumo desu ga, Nani ka? |
I would not have thought that these 2 LN were similar upon first glance, but... Overlord Isekai set in a RPG-like Fantasy world | Immense World-Building | Transfered as Inhuman Elder Litch character | Male MC starts Overpowered | Lawful Evil | Huge Repertoire of Skills | Follows Multiple Character Perspectives | MC delves in Complicated Machinations | Great Character Sheets So I'm a Spider, So What? Isekai set in a RPG-like Fantasy world | Great World-Building | Reincarnated as Inhuman Lesser Spider | Female MC eventually becomes OP | Lawful Evil | Huge Repertoire of Skills | Follows Multiple Character Perspectives | MC delves in Complicated Machinations |