If I were to only pick one, it would be
Ascendance of a bookworm.
For me it nails the balance of seriousness and humor, with a great pace when it comes to lore and world building.
The manga isnt at the level of PunPun, but thats okay, as I heavily prefer to read this story through the LN to get more intimate with the characters, which are really great.
Part one (first arc) of the manga is done, while
part 2,
3 and
4 is being drawn simultaneously by 3 different Mangakas.
The protagonist goes from weak to strong over several arcs, but still leaves her heavily dependant on others to make what she needs, which ofc makes the cast wast, but they are introduced in a decent pace that doesnt leave me guessing which character we are talking to again and in a way that makes me want to cheer them on and see their side of the story, which we luckily do in the side stories of the LN.