MADK has amazing art
some recent favs of mine (with nice artwork):
http://www.mangago.me/read-manga/oyasumi_punpun/
http://www.mangago.me/read-manga/shimanami_tasogare/
http://www.mangago.me/read-manga/ajin/
http://www.mangago.me/read-manga/planetes/
Not necessarily my *personal* favs but have stunning artwork and I still hold them in high regard:
http://www.mangago.me/read-manga/innocent_sakamoto_shinichi/
http://www.mangago.me/read-manga/annarasumanara/
http://www.mangago.me/read-manga/the_horizon/
Inuyashiki
Bungo stray dogs
I want your favorite manga please, or manga's. Especially ones that have amazing art.