Random Dinosaurs: Random Dinosaurs #4

This is just a collection of random dinosaurs. You may suggest dinosaurs for the next artworks in the comments. Hope you like it.

What are these dinosaurs?
Eoraptor: https://en.wikipedia.org/wiki/Eoraptor (Eoraptor - Wikipedia)
Ouranosaurus: https://en.wikipedia.org/wiki/Ouranosaurus (Ouranosaurus - Wikipedia)
Stygimoloch: https://dino.wikia.org/wiki/Stygimoloch (Stygimoloch)
Amargasaurus: https://en.wikipedia.org/wiki/Amargasaurus (Amargasaurus - Wikipedia)