There are several dinos to choose from for an ideal Early Jurassic Pack of sorts in mind.
For the land, there is Segisaurus, only because that’s a dinosaur in the JP/W lore since Jurassic Park. Sinosaurus, a crested dinosaur more or less like Dilophosaurus. Scelidosaurus, an armored herbivore that could’ve been bipedal based on a discovered trackway. Heterodontosaurus, a small herbivore or omnivore with odd shaped teeth. Lesothosaurus, another dinosaur, but a herbivore, within the film series lore via the DPG website poster. Scutellosaurus, another armored herbivore, but smaller and more than likely bipedal.
For the lagoons, there is Eurhinosaurus, an ichthyosaur with a swordfish-like snout. Temnodontosaurus, a much larger ichthyosaur. Rhomaleossurus, a mid-sized pliosauroid.
Lastly, for the aviaries, the only good enough pterosaur that I could think of myself is Dorygnathus.