Hearthpwn

Not easy to find one but I finally did after trying many decks....all of them warlock obviously as the class has the best combo killer cards. 

I got 2 decks that I found on Hpwn. In the right hands, they can not only destroy a combo deck but also crush aggro decks.

- https://www.hearthpwn.com/decks/1218547-legend-control-warlock-combo-agro-crusher: clear guide, detailed strategy against aggro and control. Not easy to master but once you get the hang of it...it's fun. Gnomeferatu and Demonic Project are the key cards. Demonic Project can be a problem as it can mess up your own cards...timing problem then.

 - https://www.hearthpwn.com/decks/1217435-disrupter-lock : This one is my favorite. Howlfiend and Treachery gives to the deck that extra punch to obliterate a combo deck. Not easy to master but once you get the grip of it..it's fun to play and never boring.  I still need to improve in piloting the deck...Hunters are my worst matchups, Mages can be a problem...but for the rest it's getting much easier. TIP: use the Howlfiend combo preferably in the end after Guldan you can then setup the minions to place the combo and drop defile...I have won more matches with Gnomeferatu and Howlfiend that Demonic project.

Below are some of the matches I had against Kingsbane rogue, OTK Uther Paladin, Pirate aggro Pal, shudderwok shaman, Odd paladin. :

https://hsreplay.net/replay/tzmpeKXBnMQMRwDzdxg5AS

https://hsreplay.net/replay/qvwAAjZCPhmLwCWB6Jf7Do

https://hsreplay.net/replay/Un5UaUEXKhRquw3ViGbhKE

https://hsreplay.net/replay/edJY8W2cWBW2pr8pwNr29E

https://hsreplay.net/replay/FZuvkwQbdmcoGSZDos8WXn

Yeah - this deck is legit. I've been playing a variant of the Thanos deck as well.