Ryoichi Ikegami on Great Website Onizuka
Why Ikegami?

Ikegami is a great artist! He is known for his work on Mai the Pyschic Girl, Samurai Crusader, Strain, Crying Freeman, and Sanctuary. He works in a partnership with a writer, so every series of his is significantly different, depending on who he is working with. However, his drawing style is always the same. The most highly recommended of his would have to be sanctuary, written by Sho Fumimura.