3. Majordomo Executus
For a 9 cost minion, Majordomo is a horrible card. It has no immediate effect on the game state, and compared to other 9 cost cards like Ysera and Nefarian, Majordomo just fails to make a difference. Add to that, when its death rattle activates, that your hero will be replaced with an 8 health hero, which means that in almost every situation, you will be losing health and will end up at a disadvantage.