What is a strong toy for dogs?

I have a one and a half year old puppy that is a german shepherd abd beagle mix.
I want an edible bone, other than a rawhide. He had used the Pedigree Jumbone and devoured it in about 30 minutes. He also used the Purina Busy bone and ate it in like 25 minutes.

I do not want him to head for the couch next, so please give me a suggestion!!!