I just stumbled on this Twitter blog page that shows a lot of great book illustrators, as well as artists like Berni Wrightson and Jim Steranko, that bridge the fields of comics illustation, book illustration, and fine art.

https://twitter.com/thetzvortex

I never cease to be awed by pages like these. With the benefit here of also presenting a window to authors and artists I've either never seen before, or works that I haven't seen in a long time, such as writer Algernon Blackwood.