I would say Overture has the best art. J.H. Williams is just unreal (I haven't read overture yet but Williams is always fenomenal). I'm not to keen on the Sam Keith stuff but I'm generally not so fond of these early Vertigo style artworks (Troug's animal man or Thompsons work on The Invisibles). They seem like half developed to me, but it's not like I can't look at them, it's just feels like that something is missing. But the stories are so good, I just don't care.
Why do you feel 80's and 70's artwork is dated? I'm all for Sean Phillips and Cassaday but I cant help but be amazed by some Byrne, Cockrum or Buscema pages (and I'm not that old, I'm barely 28).