User blog comment:Prime ShockWaveTX/Your Top 10 Most Vile Villains from Villains Wiki/@comment-25836248-20150113231626

1. Darkseid (one of DCs darkest villains and Superman's only real enemy that not only surpasses him in every way but makes Superman want to kill him)

2. Joker (Batman's most psychotic villain and  one of the most sadistic, deadly villains in DC)

3. Super Buu (one of the most powerful and manic Dragon Ball villains)

4. Tirek (original) (unlike many other MLP villains Tirek (G1) was just plain evil)

5. Percival McLeach (one of Disney's darker villains and a big step-up from the weaker Madame Medusa)

6. Peter Stegman (from one of the greatest thriller movies of its time)

7.  Other Mother (one of the more nasty variants of a wicked witch)

8. Cassandra Nova Xavier (take Xavier, take away all the goodness and replace it with pure sociopathy - orchestrated the Genosha Massacre)

9. Red Skull (one of Marvel's most deadly and persistantly vile villains)

10. Ivo Robotnik (only applies to Archie and the SaTaM versions but HOLY CRAP did they get dark.. especially considering its source material)