Shoujo or shounen* lol
one off the top of my head is "sadistic beauty" the colored art is fabulous
ff fufu ლ(´ڡ`ლ)
http://www.mangago.me/read-manga/ultra_heaven/
It's seinen, but the art is BREATHTAKING.
Slam dunk and one punch man
I love Adekens art - very Art Nouveau
On Doorstep, Kingsmaker (this one is colored!), Bloody Mary (BL), 19 days, Tamen de gushi, anything by Scarlet Beriko, Yi Chui Wu Yue Tiao Man Ji (Highly HIGHLY recommend!!!)
http://www.mangago.me/read-manga/meeting_him/uu/meeting_him-chapter-24/7/
Here's a masterpiece for you
Our omega leadernim(webtoons)
And sign language and all about lust have like The best art ever
For me it's http://www.mangago.me/read-manga/oyasumi_punpun/
well if it's yaoi i like art by:
ogawa chise, sachimo,nekota yonezou, yoneda kou, moegi yuu, ogeretsu tanaka, sakyou aya, kusabi keri, tennouji mio, itsuki kaname, junko, kanda neko, yamane ayano, kawai touko, tenzen momoko, kisaragi hirotaka, hoshino lily & more
i like this art http://www.mangago.me/read-manga/i_want_to_become_your_bird/ (and story) & this art http://www.mangago.me/read-manga/sensei_wa_butchozura_shite_yatte_kuru/ (one of my beutiest seme)
for shoujo:
sakisaka io, minami touko, watanabe ayu, motomi kyousuke, takanashi mitsubu, miyasaka kaho, takagi, nakahara aya, aikawa saki, yokoyama mayumi, mitsuki kako, matsumoto tomo, shiraishi yuki, nishikata mai, akegami takara, ogura akane, iwashita keiko & more
4 ex this is worth of reading 4 story & art http://www.mangago.me/read-manga/kyou_no_kira_kun/
& this http://www.mangago.me/read-manga/hibi_chouchou/ (the purest shoujo i've ever read ;D)
basically i'm a sucker 4 good art :P
Oooph~ the first ones that come to mind are Adekan and Berserk but King of Hell has nice art as well.
Sirens lamnet
Make me Bark, Royal Servant, Ten Count and BJ Alex.
Tell me a manga you've read with the BEST ART EVER. Idc if it's should or should or yaoi... Any style is good