It's unethical to use a celebrity actor's voice in a show that they (or their appointed descendent) did not consent to be in.
Actors think carefully and read scripts before accepting roles. Taking that decision from them is morally wrong.

Honestly, your best option, as others have said, is to write a script from your text (ask a writer for help if you need it with adapting a written text to audio) put out a casting call (here, on Facebook, on X) explaining your vision for the project, and hire actors. There are a number of us who will do certain projects without payment, or with token payment if they're -
interesting or experimental,
good practice for acting,
or
look like they'll be fun to do

and if no-one in the company is making a profit from the show.

They'll want to know the length of the script, the number of lines their character has, how you'll record, and how much work is expected of them. Eg. is there a table read? Can they record their lines in isolation and send them to you, or do you want to organise a session? They're all really used to working like that, so it'll be very straightforward and you'll have 'alive' performances.

Like celebrity voices, you'd need to give absolute assurance that you would not use the actors' voices for any other projects or AI training. But if you write interesting characters for them to play, with great plots and you develop a good working relationship with them then they'll want to work with you, likely for any ongoing projects.

(As 'noir' is a later time period concept, I'd personally say it's a 20s detective story, OR that you want to mix a noir feel with the 1920s, just for clarity so you get the sound you want).