Sexto Rodríguez is a more successful singer and songwriter

Perhaps more Latin influence on US music and a lot more people learning Spanish to hear Latin music. It would be influential enough I’d know who the hell Sexto Rodriguez is, for one, and maybe more Spanish words and names would come up on my auto fill. Which I’m totally fine with - I have zero use for high school Spanish right now and wish I had more use.
Except that his own songs are in English, not Spanish. Say he makes his first record as early as 1962 or a little earlier and then goes on to make a lot more material, perhaps including some double albums.