Out of these, rutiodon

Out of anything, Yamanasaurus

But fr a Rutiodon would be pretty cool for an antagonist

The rutiodus

Rutiodon it is then

Fortnite

True, Fortnite is an antagonist of humanity, but did you read the first reply?

No lol

The fanfic will be serious

Oh

Desmatosuchus is more fitting because postosuchis is the protagonist

Postosuchus*