To start, I guess, there would be more than one creature that eats the large beetles, but you can assume any large predator, especially the dire creatures, wouldn't have too much trouble cracking open a beetle's exo-skeleton. It would also depend on the area, I suspect, and I'm sure sentient races (such as goblins) would have no problem eating beetle. Is there something specific you're looking for? A specific area or type of beetle?