Not quite the same, but John Martin (of who I learned from the cover of a Lovecraft compilation
) is pretty good too in this kind of imagery:
(Image removed from quote.)
Wow, Martin definitely also has that eerie feel to his work. On his wiki

The Destruction of Sodom and Gomorrah,
That's really awesome art. I especially like the scale in the second and third paintings.
He definitely seems to play with scale a lot (which I love). Gives a sense that your viewing something that's beyond yourself.