Commanders forced to fight against their usual style

What is a good example of a commander successfully or unsuccessfully fighting against type?

Cunningham at Cape Matapan is one answer, but Napoleon pushing the cautious Villeneuve into the Trafalgar campaign provides the fuller case.

Andrew Cunningham at Cape Matapan is the first suggestion, but Pierre-Charles Villeneuve at Trafalgar provides the fuller example. Villeneuve preferred preparation and closer integration with his Spanish counterparts before battle. Napoleon's pressure left him choosing between leading the operation himself or handing it to someone who had done less of that preparatory work. Political direction can force a commander to fight against his preferred method and readiness judgment.