There are many good art blogs out there cataloging these things, so please spend some time at Monster Crazy and Monster Brains, where you are likely to lose hours at a time just taking it all in.
Now that that's out of the way, we must point you to the work of Christopher Mitten, an artist and illustrator working in comic books. He's been at it long enough to have a crackerjack resume but we just learned of him and are looking forward to reading some of the books he's worked on.
Stylistically, his work recalls Bill Sienkiewicz and Mike Mignola. And like the former, it's especially fun to see what happens when Mitten interprets iconic characters from sci-fi, horror and pop culture past.
His Skeletor will erase any memory you might have of the silly Filmation
And don't you just love Mitten's fin-enhanced Creature from the Black Lagoon?
Mitten is launching a new site soon, so keep looking at his Tumblr, where we guess he'll post more in the meantime.
["Creature from the Black Lagoon" illustration by Christopher Mittens 2011. Copyright applies, so don't copy it without attribution, ya dig? Commissioned by Ashcan Allstars for a Universal Monsters theme.]