If you still need theme music for evil
Voltaire- when you're evil
It has that classical touch with violas and violins in it but also has cartoonish levels of evil bad guy lyrics.
In addition to that their is also the bands
Dr. Steel - thematically a band about evil super science with lots of 1920-1950s sci-fi references... lot of accordion and beat mixes
Cog in the machine - lot of steam punk mad science themed music