Jedi do not fight for peace; that is a slogan and is misleading as slogans naturally are. Jedi fight for civilization as civilization creates peace.
Mace Windu (72 BBY — 19 BBY) was probably the most famous human Jedi in the galaxy, his skills only second to Master Yoda.
Windu was a Jedi Master of legendary status and a senior member of the Jedi High Council. He possessed extensive knowledge of Jedi history and philosophy, and was a diplomat by nature. His wisdom and experience were legendary, as was the weight of his words.
In addition to his reputation for wisdom and power, he was considered to be one of the finest swordsmen to ever grace the Jedi Order. He created Vaapad, a dueling technique which contained certain elements of dark side practices. It was said that only Yoda and Count Dooku could outspar him.