If you have not checked these stunning digital artworks and concept arts by Septagon Studio, I would suggest you do so at the earliest as they are freaking awesome!
Here is a little about Septagon Studio:
Septagon Studios Inc. is a publishing company founded in early 2003 by company President and C.E.O Nicola Defina with his two cousins, Philip Defina (Vice President and Art Director) and Domenic Defina (Consultant and Art Direction). Septagon Studios has carefully positioned itself to occupy a historic place in the industry, and combining comic book publishing with creator services is just the start.
Check these amazing people out on: