Dinovember #16 - Pachycephalosaurus wyomingensis

From Wikipedia : "Pachycephalosaurus (/ˌpækᵻˌsɛfələˈsɔːrəs/; meaning "thick-headed lizard," from Greek pachys-/παχυς- "thick", kephale/κεφαλη "head" and sauros/σαυρος "lizard") is a genus of pachycephalosaurid dinosaurs. The type species, P. wyomingensis, is the only known species. It lived during the Late Cretaceous Period (Maastrichtian stage) of what is now North America."

Please can you help me ? Give me 3 names of cool dinosaurs and I'll try to do it. I almost finished my list, but I can put one of your propositions!
EDIT : All dinosaurs have been chosen and made! Thanks all for helping!