Another one of my top favourites whom I think most people already know about. /o\
I just cannot get enough of エナミカツミ (Enami Katsumi)’s works…EVER. He is most well known for his work on most of 成田良悟 (Narita Ryohgo)’s light novels, probably most notably, Baccano!. His style is really distinct, even though he has a few of them, and I can spot them from a mile away, seriously.
He’s not only good at the shiny anime-ish style, but his realistic style and even his landscape/scenery pictures are marvelous as well. The colours he uses vary with the subject, but they always fit right in…I think my favourite thing about his illustrations are how different they are. So many poses and styles! He also did the Star Ocean 4 character designs.