Sir Gawain
Most Chivalous Knight
Sir Gawain was the most chivalous knight, he fought for his king when the green knight showed up looking for someone to play his game and no one would play but Sir Gawain.
Also when Lancelot killed the two knights that look up to Lancelot the most and they didn't have and armor on, Gawain said that he would never forgive Lancelot for everything he has done.