The sexy, hip-swivelling ‘70s tunes and heartfelt ‘60s ballads Rod Stewart released had a monumental effect on ​the many impressionable rock ‘n' rollers ​who followed in his wake. If imitation is the sincerest form of flattery, Stewart must surely have a healthy ego, thanks to the sheer number of beloved singers—from Southern rockers to L.A. sleaze metalheads—adopting his gritty, hot-blooded rasp and ​belting over​ bluesy six-string hooks.