If light/children's verse is allowed:
The Wendigo,
The Wendigo!
I saw it just a friend ago!
http://alykatglasscreations.devianta...Nash-226578714
Don't forget to check your veranada tonight before bed.
Jack Prelutsky has a bunch of (obviously) relevant material in several of his collections, including
The Dragons Are Singing Tonight,
Monday's Troll,
The Gargoyle on the Roof,
The Baby Uggs Are Hatching,
Nightmares: Poems to Trouble Your Sleep, and
The Headless Horseman Rides Tonight: More Poems to Trouble Your Sleep. Shel Silverstein has some monster poems, too. But this may not be the direction you intend to go, or even temporarily wobble into. A little Jack Prelutsky goes a loooooong way.