What's the best AI tool to add emotion to a voice?

Hello everyone! I'm currently working on building virtual identities. I just launched a new AI influencer explaining it better : https://www.producthunt.com/posts/dr-hans-ghostcraftman I know I can improve a lot of thing, but I thought my voice is the most urgent. Indeed, despite all the good things people say about text to speech (11lab, synthesia, etc.), I find it very robotic-sounding. I'm doing some post-production on Audacity to improve the EQ and extend the pitch variations, but I'm still only 10% away from the desired result. Does anyone know of an AI tool that can solve this problem? Or would you know any sound engineer tricks (film, music, etc.)? :)