If you want to play a deck with expensive minions then you can always go the control route. Just as an example, pretend I am playing Vet against Vanar. If I play the following threats(demand dispel)- Alomancer, Starfire Scarab, Nimbus, Aymara, Aymara, it is extremely unlikely that they will continue to have answers. Against decks without Trinity Oath(haha) if you can keep your hand size at 3 cards or so and have your opponent at the same or less they are not gonna have removal.
You likely will need to pack in extra healing and play defensively to not die before you reach this point in the game but I have had plenty of games where an unanswered expensive minion has won me the game the turn after or several turns down the road.
Pandora, Red Synja, The Scientist, Grove Lion, Jax Truesight, Grandma Embla, Ghost Sepharim(kinda), Draugr Lord, Grandmaster Zir are all cards that I have experimented with in various decks. Granted they might not always be the best choice, but they are definitely playable if you build your deck more towards the late game.
I have a Control Vaath deck that has this gameplan. Win condition is to stall the game out until your opponent is topdecking, then smash him in the face 2 times for lethal. If anyone wants to see the list let me know