Mike Mignola is the creator of Hellboy. Over the years, his style developed, becoming  minimalist, angular, moody and dark, with very strong compositions, and a good use of negative space.

EXAMPLE BOOKS/ISSUES:

Hellboy: The Art of Hellboy

WEB SITE:

www.artofmikemignola.com

SIMILAR ARTISTS:

Duncan Fegredo has illustrated some Hellboy stories in a similar, although a bit more detailed, style. Alex Toth shares some similarities regarding the minimalism.