Wait, are you alleging that an individual has a right to faithful imitations of their voice, as well as to their actual performance?
So if I do a really good Morgan Freeman impression and I want to use that voice for a voiceover that I make, and I intentionally do an impression, he should have the right to tell me I cannot use the voiceover that I made, because I intended it to sound like Mr Freeman? Even if there is no intent to mislead and it's rightfully credited etc (not like the Tom Waits situation in TFA where the ad was intended to deceive)
What stops that from extending to parody? Should Sarah Palin be able to sue Tina Fey for the impression on SNL all those years ago?
If all it boils down to is >The end results sounds enough like her
this starts to sound like celebrities with sufficient popularity and clout can trademark likenesses that are sufficiently similar to them. So is the voice actor who happens to sound like Scarlett Johnansson but is insufficiently famous not allowed to use their own voice in recordings because it might sound too much like the famous person?
Absurd absurd absurd