Hearthpwn

What kind of deck could i put him in that he could benefit in

Hogger, Doom of Elwynn

Patron warrior? Anti Cthun?

Just about any Warrior deck except perhaps for the extreme wallet or fatigue warrior. Can fit well with or without Patron. 

Any deck that benefits from having cheap spells. That means most rogue decks (combo), miracle decks (replace banana with a card), Atchmage Antonidas (fb), etc...

Hey Man!

Hope you are enjoying the game!

If you don't have patron warrior, I would suggest you dust it

Hope this helps!

-Funkee

I've seen Sjow playing conrol warrior with it, and it has worked very well for him.

It's a big pain because you can't hit it more than once.  You have to use hard removal or a minion big enough to down it in one go.  Definitely underrated. The cost means it can only be in a stall deck, but those are quite viable, possible the 'new handlock' that uses Midnight Drake

I know that this probably isn't the answer you were looking for, but it's probably best to just dust it. I don't think that Hogger, Doom of Elwynn is particularly good in any deck. Could you squeeze him into some sort of Patro/Control Warrior deck? Probably. But is he really going to be the best choice? No; in fact, there are even other 7-drops that I'd consider to be stricly better.