I'd personally say the most evil acts in the series are: 1) Ramsay's treatment of Donella Hornwood. 2) The deaths of Aegon and Rhaenys. 3) Tywin's destruction of the Reynes. (due to how over-the-top his methods were) 4) Randyll Tarly threatening to kill Samwell. 5) Victarion murdering his wife for being raped. What do you think?