So I am really not a huge fan of MMO style Isekais with leveling systems. But I heard that Latna Saga was the best of the genre, and boy the online recommendations were right. This is by far the best of it's genre, not only pulling off satisfying power development for the MC but most every important supporting character as well. The side characters were also very well written and engaging, feeling well fleshed out and motivated. Honestly, while it is what everyone and their mother says about every manga/manhua, it really does give strong berserk vibes with the well written side characters and darkfantasy worldbuilding (also the MC uses a big sword).

Even if you turn your nose at other power fantasy isekais, do not pass on Latna Saga, as it really is on another level, at least IMO.