Mangas similar to Ragnarok or Warcraft series?

Hi

Can anyone recommend me mangas like Ragnarok(the manwha that the game was based on)
or the warcraft series like the sunwell trilogy?
Im looking for that fantasy - medieval based setting with magic, etc. But I really need the artwork
to be clean and realistic like the two mangas I listed above, nothing with characters being drawn
like they are made of sticks. (for example, clamp art)

Thanks!

Manga similar like Ragnarok Game is Yureka.
The story is about a boy who like to play online game, and the online game that he play is similar like Ragnarok. It's pretty fun manga.