Many kings have been released in royal family of dinosaur toys, usually in the form of Tyrannosaurus Rex but, also in the form of Cryolophosaurus, which is jokingly nick named Elvisaurus, the king of the paleo rock and roll.
Brand: CollectA
Review: Arsinoitherium (CollectA)

4.3 (20 votes)
Arsinoitherium was a large herbivorous denizen of swamps and rainforests during the late Eocene and early Oligocene eras. Despite its resemblance to a rhinoceros, it was more closely related to elephants, hyraxes, and sirenians.
Released by CollectA in 2014, this Arsinoitherium toy measures just about 18.5 cm long from the tips of its horns to the end of its tail.
Review: Argentinosaurus (CollectA)
Review: Acrocanthosaurus (Deluxe Prehistoric Collection by CollectA)
Review: Gigantoraptor (CollectA)

3 (15 votes)
At four metres tall, eight metres long, and more than two tons in weight, Gigantoraptor is by far the biggest known oviraptorosaurid. Its toothless lower jaw suggests a herbivorous diet (the rest of the skull is unknown), but its powerful limbs and sharp claws meant that it was not an animal to be trifled with.
Review: Moropus (CollectA)

4.9 (16 votes)
Chalicotheres were an unusual family of ungulates related to the similarly extinct brontotheres as well as extant horses, rhinos, and tapirs. At over 8 feet tall, Moropus was one of the largest chalicotheres. Unlike its smaller relatives, it appears to have walked on its palms as opposed to its knuckles.
Review: Spinosaurus (Swimmer and Walker by CollectA)

4.2 (19 votes)
Her limbs paddling, her tail undulating, her great sail cutting through the water like a razor blade, the angler pursues her quarry. Although she cannot see in the murky water, her narrow snout contains pressure sensors that detect the slightest movement. A quick jerk of her neck, a snap of her jaws, and a fat coelacanth is caught.
Review: Neovenator (Deluxe by CollectA)
Review: Stegosaurus Corpse (CollectA)

4.4 (14 votes)
Under attack, the young warrior lashes out desperately. Although he possesses great strength and weaponry, his stamina is fading and his attackers are many. His thagomizer swings through the air, but then one of the allosaurs manages to seize it just behind the spikes and hold on furiously.