If you could go back in time and stop any one person or group's musical career, who or what would it be?
This isn't a "go back in time and assassinate" someone question. It's just their musical career never takes off and thus any music they ever would have made is no longer in this timeline.
Ted Nugent. He is just a complete scumbag and without his shitty music career he never would have impacted so many people with his gross bullshit. The world would be better off if his music never existed.
I won't say his name but I stopped someone's musical career once. He was an up and coming young guitarist, getting performing gigs here and there, and teaching guitar students to help pay his bills while waiting for a break. I took some lessons from him and as part of general chatting it came out that I worked with computers. He thought that was interesting and asked good questions, so I brought him some programming books. He became a full time programmer a couple months later and a very good one too. I'm glad it worked out for him, but I always wonder what we lost.
The cunt worked out how to make millions from gouging money from kids with cheaply produced pop, and caused a massive collapse in the quality of the British music scene, from which it's never really recovered
Outside the box: Robert Elliot, a charter pilot who flew and killed Jim Croce by crashing into a tree on takeoff. Pilot error was found to be the cause as the overweight 57 year old pilot was unable to drive to the airport so ran for 3 miles, from his motel to the hangar, to be on time for the flight. The run exacerbated his coronary artery disease, causing him to tunnel vision and not see the tree.
I'd do the inverse of this and see what might have happened if Charles Manson had had a successful music career. I heard an album of his songs and they were actually pretty good, kind of a mix of The Beach Boys and The Doors. Maybe if he'd sold some more songs then he wouldn't have gone into the whole murder cult thing.
But then again maybe it would have positioned him to be way worse and we're actually living in the universe where somebody stopped Manson from achieving true wealth and power and like leading a nationwide death cult or something.
Phil Spector. His wall of sound bullshit caused decades of potentially amazing albums to sound like shit, and he's a terrible person who has brought nothing on the world that's worth keeping.