There is a paid version of Voicemod that unlocks way more effects presets and greatly expands your options for vocal modulation. For about $50, you’ll unlock more of these vocal presets and you’ll also gain access to the softwares Voicelab. Voicelab allows you to create custom voices and save them. If you have experience producing or recording music, creating a new voice in Voicelab is very straight forward. The process is very similar to adding effects plugins to an input signal inside any DAW. Once you’ve established your audio input, you simply select or deselect the effects you want to add to your sound. The effects you can add include delay, a vocoder, reverb, wah-wah, pitch, EQ, stereo, and more. You can adjust the amount of the effects you want in your output as well as adjust details of the effect like room size on your reverb or delay length on your delay.
Check out this video from Voicemod that demonstrates how to create a custom voice using their Voicelab: