Prideful

Yandere (just once was enough for hating it forever)

G-senjou no maou

Little Busters

Uhm, Grisaia Trilogy I guess
Esp the first installment was a breath of fresh air at the time i read it, gave an MC thats actually proactive and reliable for once 

ChuSinGura, without a doubt. 

John Cena's Sexy High School Adventure!!! 2

if my heart had wings.

Muv Luv Alternative

Tsukihime

Nothing beats white album 2

Umineko

subahibi

Newton no Ringo has one, It's not that bad but don't expect it to be top tier 

Whether the art is good or not is quite subjective, so I couldn't say for certain that you'll like the art in my recommendations here. But still I want to recommends some VNs here, so let me try here. As for my recommendations here, I would say that both of Sanoba and Dracu Riot di have the good art, and so does Hoshiori (It's still in translation progess though, but I'm sure that you can get it in near future). Also I would like to recommend Suki Suki as well seeing that it'll be coming at 13th later, and perhaps I can say that HGB did have the good art as well even though the release date for that i still a bit uncertain. For the last recommendations here, I would recommend both of Maitetsu and Hapymaher, in which the former did have some trivia matter in regard of train and business. I hope that my recommendations here would be helpful to you.

Yes, Princess Evangile has nice art.
If we're going by art quality, then I'd also recommend Konosora, Koirizo, Chrono Clock, Yoake, Fureraba, SakuSaku, KoiIro ... there are many good looking translated VNs. ToHeart2 is actually pretty good looking too.
I also absolutely loved the art in YU-NO (original, not remake), but YMMV in this case.

Princess Evangile maybe? It seems that you like art that is colorful and attractive, but not too fancy.