I Feel Fantastic by Jonathan Coulton. Luckily my best friend likes it too, so we can crank it on her car stereo and sing along at high volume like the nerds we are.
Freaks out people in the back seat, of course, but they get used to it, eventually.
This Corrosion by Sisters of Mercy.
Or pick any song from “Made In Japan”!
Different composer, but the ELP track of the same name could possibly set off USGS sensors if turned up to 11.
The Phantom of the Opera theme! And… the opening sequence from the Sweeney Todd soundtrack. Yay for organs.
The entire catalog of Primus.