Final answer:
The individuals who believed that a bill of rights was unnecessary and potentially dangerous in the proposed U.S. Constitution were known as the 4) Federalists.
Step-by-step explanation:
Those who agreed with the view that 'bills of rights are not only unnecessary in the proposed constitution, but would even be dangerous' were called 4) Federalists. The Federalists believed that listing rights could be problematic because rights not included might be assumed to be unprotected.
They argued that a strong central government was essential for the nation and contended that the federal system itself would protect personal freedoms. In contrast, the Anti-Federalists feared the concentration of power in a central government and felt a bill of rights was essential to protect individual liberties.