>>307354063
It's not really a recommendation since I don't actually use it outside of memes, but way back in 2018 I got interested enough to try out a few voice changers and record examples. The most flexible/powerful I found is IRCAM trax, an old VST that you can find torrents for. Sounds like this (on an old CV1 mic), walking through the options:
https://streamable.com/aoyjqy

I also tried graillon and antares throat evo, but found them trickier to use for worse results.