So I'm looking for recommendations of manga with good art. I'm not really concerned about genre or plot or characters or even if it's been translated, just that the art is good. I'm looking to brush up on my drawing skills, so I need references.
The things I value in art are clean drawings, beautiful landscapes and architecture, subdued and more realistic character design, subtle use of expression and posture, and interesting use of angles and layout. The manga I've read that I'd say had particularly noteworthy art would be: Yokohama Kaidashi Kikou, Mushi-shi, Pieta, Aria, and Coelacanth.
Like people have suggested, I also recommend Inoue Takehiko's Vagabond, which is the samurai one, or Real, which is much more modern in its setting. He does a ton of his stuff with a brush, which is relatively unique among manga artists.
Mori Kaoru's work was also mentioned, Otoyomegatari.
Those two are top of the line as far as I know.