Signal provides all the privacy I need, and it’s nowhere near as skeezy as most of the alternatives mentioned in the comments here. As far as I’m concerned, there’s nothing better, but if OP would like to detail their objections to it, I’d be happy to hear them.

Signal.

Google bought up GrandCentral years ago and turned it into Google Voice, where they could freeze the feature set and ignore the product and any possible innovation. Multiline autoringing and speech-to-text on voicemail was it, forever. If innovation had stayed on the table, we could have had rule-based personal phone trees, maybe with different greetings and options based on known/unknown/masked caller ID.

25 years ago, I pressed 7 and got to hear the duck quack. We didn’t know at the time that it was a golden age.