All of them rock!! Very sad when Nirvana came on the scene,that's the day rock and roll was over and the grunge or alternative scene began,rock and roll is a thing of the past but I wouldn't listen to anything else!!
AC/DC is still out touring. The other two are playing county fairs. I will give Def Leppard this. They did kick a$$ and pretty much made MTV what it became for rock videos. Plus the drummer had his arm ripped off and kept playing. Huge props for that.