Another interesting example is Kevin Costner. Although not a singer...if you compare his voice in his earlier movies to his last few...including his TV show “Yellowstone” on Paramount, his voice is much more raspy with some depth. As I’m sure Gary will attest to...early Hollywood actors came from radio. Voice training and technique were already engrained in them.

I remember listening to Costner’s voice when he was younger and thinking it sounded like Bart Simpson But I guess not everyone can be blessed with the “Sam Elliot” chops!
JM