All good suggestions. I’m trying to think of only TWO songs that can provide all of the following:
1. Dynamics.
2. Soundstage and imaging.
3. Frequency response.
4. Bass textures.
5. The critical midrange - female and male vocalists and most instruments sounding natural.
6. Top end clarity and air without harshness.
This is fairly hard to do. I can think of numerous songs that test one or the other, but not all of these qualities. But it is a good exercise for those lucky enough to actually have a bricks and mortar store nearby so we can hear amps, speakers, streamers and such before making a purchasing decision. While many stores will entertain you playing a couple tracks they’d likely not let you listen for an hour - unless you kick them some $$ in upfront "good faith" money, which isn’t a bad idea anyway for their time and trouble.
Funny that no one mentioned Cheapaudioman Randy's test track of choice, Tool's "Chocolate Chip Trip" for soundstage and imaging.