Final answer:
Othniel Charles Marsh and Edward Drinker Cope were the prolific dinosaur collectors in history, known for their rivalry during the Bone Wars of the 19th century.
Step-by-step explanation:
The two men who collected more dinosaurs than anyone else in history are Othniel Charles Marsh and Edward Drinker Cope. These notable paleontologists of the 19th century were engaged in what is known as the Bone Wars, a period of intense and sometimes ruthless competition to discover and describe new dinosaur species. Their work significantly contributed to the field of paleontology and the accumulation of knowledge about prehistoric life.