Krampus

 https://en.wikipedia.org/wiki/Krampus

Krampus sure seems to be quite a monstrous entity.

https://en.wikipedia.org/wiki/Krampus#Appearance

https://en.wikipedia.org/wiki/Imp

DEMONS & MONSTERS (Animated Music Video) https://www.youtube.com/watch?v=Fh24-nQzBX0

Krampus (film)

 https://en.wikipedia.org/wiki/Krampus_(film)

The Grinch

 https://en.wikipedia.org/wiki/Grinch

Just another cantankerous, monstrous Imp. 

https://en.wikipedia.org/wiki/Grinch#In_popular_culture

Many would say that Krampus looks much more menacing.