Ironforge Portal/Yogg Warrior

In general, since the majority of ladder play is either aggro or midrange, these are the cards you want early game so you can survive to late game to start dropping heavy minions on board.

Should be obvious- all these cards listed make aggro decks cry. Doomsayer and War Axe are the ones you need to get the most (for the most part). Every thing else will help you survive, but your chances of higher survival against zoo or tempo skyrocket with either of the first 2 cards I had mentioned.

With control, you shouldn't expect too many minions on board, so just start building up armor instead of eliminating the early game. Justicar is good because you can start building up armor quicker around turn 5 or 6 depending if you have coin or not. And Yogg is good to have in your hand in a control match up because then you won't have to be digging through your deck looking for him if you are in a desperate situation.