Hello! I'm searching for something "new" - I mean, something with very good art and plot (like Love Stage!! or Katekyo!).
I really love these mangaka:

• MOEGI Yuu
• Nekota Yonezou
• KODAKA Kazuma
• SAKURAGI Yaya
• KANDA Neko
• MIO Junta
• SADAHIRO Mika
• SAKIRA (I mean, the art - most of her work are only smutsmutsmut, lol.)
• IKE Reibun
• EIKI Eiki & ZAOU Taishi
• KOTOBUKI Tarako
• NAKAMURA Shungiku
• YOO Ha jin
• OOTSUKI Miu
• LEE Young Hee
• MONCHI Kaori.

I don't really like shota, but if the plot is good, I can give it a try.
I don't mind incest or sm or anything. Also, I don't really have seme/uke preference. I just want to read a really good manga, with a funny and serious plot. Maybe with more than one volume?
Can you help me? (:

Its weird that you don't have Yoneda Kou on ur list, but maybe thats just me.. I love her works so much I'm basically a stalker of her books.
Also you could try :
Ogura Muku beautiful artwork
Takashina Yuu on her work in DeadLock together with Aida Saki another great author (she doesn't do the drawing, none that I know of) she often work with different artist.
Sugano Akira my favourite shounen ai author
Hidaka Shoko both her writing and art are great
Takarai Rihito if you up for slice of life kinda genre
Yamamoto Kotetsuko because why not? Her artworks are adorable and so does her storyline 🙂
Junko is basically my go to mangaka when I need a dose of cuteness
Madarame Hiro her art might be a little bit crazy (in a good way) but her writing always got me LOL
Takagi Shigeyoshi or also known as Ogawa Chise, despite her works often are mess up more than a clown's face, I don't know why I would still read them
My newest favourite Ichikawa Kei ..
Plus others equally great mangaka
Minase Masara
Natsume Isaku
Yamada Yugi
Kitazawa Kyou
Tennouji Mio
Inoue Satou

A good novel tells us the truth about its hero; but a bad novel tells us the truth about its author. - G.K Chesterton