Wikipedia's list was pretty lame, so I thought it would be cool to make our own. This first step will be the nomination stage. Just post who you think should be the best baddie of them all. I'll keep track here. I would prefer single nominations, but doubles are ok.
NOMINATIONS
The Riddler
Bowser
Sepiroth
Ganondorf +1
Ridley
Metal Sonic
Sigma
Merick
Knights who say Ni
Hitler
Kefka
Venom
Arthas
Barney
Grimmjow
Aizen
Alex
Wind Dude
Loki
SoT
Mr.T