These classic herbivores are good encounters on their own or in the company of humanoid companions.
A xenophobic saurian shaman (Ultimate Magic 39–40) rides an ankylosaurus and opposes intrusions into her land. While aggressive, protecting herself and her beast is always her first priority, as evidenced by her totem transformation power of scales.
The colony of Farthest Grange seeks to be an outpost of light (and profit) on a dark jungle continent. Unfortunately, they’ve broken ground in the path of the brachiosaurs’ annual migration, and the savage halfling herders who tend them are notoriously unsympathetic to tall folk.
Hobgoblins call ankylosaurs “armor beasts” after their plated hides, and ride them into battle as living troop breakers and siege weapons.
—Pathfinder Bestiary 83