James Harvey (formerly credited as HARVEYJAMES) is one of those artists who doesn't draw in a manga style, but has instead absorbed many of the stylistic lessons of manga and built his own aesthetic around them. His artwork has a heavy emphasis on character design and a careful attention to anatomy. He's tried his hand at an updated Tank Girl, pirates both fanciful and historical, and all sorts of characters who look ready for stories of their own.
Blank Slate published Harvey's A Long Day of Mr. James-Teacher, a diary of a day in his life as an English teacher in South Korea, and they're also publishing his upcoming body horror comic Zygote. Unfortunately, he was passed over for a gig drawing Tank Girl, but at least we get to see the products of his tryout. You can see more of his work on his Tumblr.