Fur Shur in 1066 William was going to invade and take over England with or without the Pope's approval.
A minor example, but still an example.
William is a poor example. He did it as a temporal ruler in the two-sword context, acting on his claim to the throne. By the two-sword understanding, the Church did not normally get involved in adjudicating claims to thrones. Bishops did criticize kings who used naked abuse of power in unjust wars—e.g., Bishop Hugh of Lincoln against Richard I in Richard’s wars in France. Or Hugh’s dressing down, while still an abbot, of Richard’s father, Henry II—who actually listened to Hugh and changed his tune, on occasion. It took guts to face down a king who had contributed to the murder of an archbishop. Medieval kings simply were not absolutist rulers, certainly not William the Conquerer. William was dependent on his nobles’ support. Absolutist rulers had crushed the nobles’ effectual power. That you confuse William I with Henry VIII shows you are the smoker.