Here are some really impressive illustrations made by Tom French, a designer from England. Here is a little about Tom from his About page on his website:

His works are predominantly figurative. He carefully combines detailed photorealism with strong elements of abstraction and surrealism, focusing on the reflection of the conscious and subconscious mind. French’s work often treads the fine line between the beautiful and unsettling, combining technically tight, classical charcoal drawings with carefree, loose and ostensibly unfinished abstract forms

You can find him on his official website at Tom French’s Blog