William Wallace
When playing as the rebels (.conan.) Play them in the high or late period. Make a small rebel army with 1 unit of archers, 2 units of highland clansmen, and 1 unit of mounted sergeants (with golden armour, and weapon upgrades). Wait until the year 1287. and then make a unit of Chivalric men at arms. The leader of this unit will be "William Walays" which is of course with medieval spelling "William Wallace". Not only will he be a good general (6 stars) but he will have the vice "fine leader". You can also add more command by making him king of Scotland.
Thanks Bob MC