I was hoping to see more of them but I guess the CGI budget was reached. So there's Godzilla, King Ghidorah, Monthra, Rodan, Kong, Mammoth monster, Spidercrab monster, another Muto and Turtle monster. Who are the others?
According to wikizilla
There's 18 Titans in total, including Godzilla.
You forgot a few:
- Destoroyah (just another monster but kinda popular)
- Space Godzilla (I think it is what pushed Gidhorah off its planet)
- Biollante (another monster semi-popular)
- Battra (Mothra's brother)
- Megaguirus (another titan)
- Hedorah (the Fog Monster)
- Megalon (one of the first)
- Monster X (a stronger one)
There are more but those are the ones I saw you forgot. There are more than 17, a lot more.