Lord of Mysteries
With a score of 8.61 from over 197K users, this is a community favorite. An isekai series that explores the genre's tropes with its own unique spin.
In a Victorian world of steam, dreadnoughts, and occult horrors, Zhou Mingrui awakens as Klein Moretti. He walks a razor's edge between light and darkness, entangled with warring Churches. This is the legend of unlimited potential...and unspeakable danger. (Source: Crunchyroll)
Plot summary from MyAnimeList. Data and images via Jikan API.