How many ends of the story are there in The Witcher (game on Ps4, 3er)?

I have rummaged through the internet and have found 3 so far.

How many do you know?

And does anyone happen to know which quest or questions cause the game to end differently?

Which is the happiest or best ending?

https://www.giga.de/...-and-wine/

Thank you! All questions answered with a contribution 👍