Trying to find this.....
All I can find is he was "One of the Best" that the Jedi ever produced. Nowhere stating he WAS the best.
Mace Windu was a
male Korun Human Jedi Master of legendary status who was the
Master of the Order in the days leading up to the
Battle of Geonosis, after which he gave the title to
Grand Master Yoda. Hailing from the world of
Haruun Kal, Mace Windu served as one of the last members of the
Jedi High Council before the
Great Jedi Purge. Serving on the Council, Windu was often regarded as second only to the Grand Master Yoda, though Windu was eight centuries Yoda's junior. Windu's wisdom and power were considered legendary by many, as were the weight of his words.
Trained as a
Jedi Guardian, Windu was considered to be one of the best swordsmen in the history of the
Jedi Order and had created the modern seventh form of
lightsaber combat,
Vaapad along with fellow Jedi
Sora Bulq. He was the only practitioner of the form who did not fall to the
dark side. Windu served the Jedi Order his entire life, training several
Jedi, including
Depa Billaba and
Echuu Shen-Jon.
It was Master Windu who led two hundred and twelve Jedi into combat at the Battle of Geonosis and slew the infamous
bounty hunter Jango Fett. He continued to serve the Republic throughout the
Clone Wars, often on the frontlines of fierce fighting, where he led Republic forces as a
High Jedi General. He would distinguish himself across many battlefronts, most notably on
Dantooine, though he would distinguish himself on
Ryloth,
Null,
Boz Pity and
Haruun Kal amongst others. In the final days of the war, Windu confronted and defeated
Darth Sidious in a difficult
duel, after being informed by Jedi Knight
Anakin Skywalker that Sidious and
Supreme Chancellor Palpatine were the same person. He was ultimately betrayed by Skywalker and subsequently killed by Sidious, falling to his death from the window of Sidious's office.