While the hero is played by the actor who makes the character work, the villain has to be played by the right actor 

He gets far more scope and range and has a lot more fun 

Alan Rickman in Robin Hood 

Wesley Snipes in Demolition Man

 Armand Assante in Judge Dredd 

Jim Carey 

Tommy Lee Jones 

Jack 

Michelle

 Danny 

Arnold

Uma 

in Batman