Well, this is going to be a bit of a list, but I'll try to sum 'em up.
Kolek QuarterTroll | 1/4 mountain troll, 3/4 Orc. He's big, mean, and ugly- strong enough to lift a horse over his head and quite likely to eat it afterwards. A rather simple fellow, but terrifyingly powerful. He was a general during an Elven-Human joined invasion of his lands, and under him, they actually managed to win for quite a while. Y'know, before they brought in dragons and burned him alive.
Viortu SoulSinger | Another Orc, this one a powerful shaman. She was another leader during Kolek's time, only she sat at the head of the circle of shamans. She advocated for peace and coexistance, and was killed by her own people for perceived weakness and treachery. A decently powerful mage but incredibly gifted summoner, she speaks to spirits like most people talk to their neighbors.
Caeca Luma | Lover of two kings, a usurper and the "rightful" prince who deposed him in turn, and perhaps the most powerful mage in recorded history, Cae bore the king's bastard and died trying to see him named heir. In spite of being more than half crazy (or possibly because of it) she had an incredible talent with most every sort of energy-based magic.
Alraz bin Adeola | General and lover to a powerful Tyrant, he later became a hero in his own right, leading several armies to victory against overwhelming odds and holding together an unwieldy and tumultuous empire with his strategy.
Tendaji | Rebel leader and possible descendant of an ancient line of kings. He used Guerrilla warfare and witchcraft to try and take back his island nation from continental imperialists. He succeeded, but died not long after due to a curse he accepted in return for victory. Very charismatic, but totally clueless to the wider world.
Thurin the She-Bear | Daughter of a powerful Jarl, she rode the semi-mythical eight-legged steed known as the Nightmare, and banished other creatures of darkness back to the cold frozen north before the Nightmare called in her debt and she was forced into a lifetime of servitude in return for the horse's help in the campaign. An extremely skilled rider and huntress, Thurin has become a figure of myth in her own land of Kaarnholde.
Ymber Aquila | Perhaps the most talented swordswoman in the history of the paladin order, she became a famous demon slayer and was eventually declared the first Lady Commander of the Order of the Dawnblade. Unfortunately, it was during her short reign that one of the greatest demonic incursions in recent history occurred, and she was killed in the line of duty- purportedly by a dagger in the back.
Tysa the Oracle | Born a slave with the rare gift of prophecy, Tysa eventually lead a rebellion of her fellow slaves, beginning with the gladiators, and toppled an empire. In spite of being blind she was very well learned, and orchestrated the coup almost entirely on her own. She then became a lifetime member of the triumvirate, and lead the newly freed slaves until her death at the age of eighty.
Ceryx Luma | Son of the aforementioned Caeca Luma, Ceryx would eventually die on his half-brother's sword, but not before delivering a fatal wound of his own, not only to his sibling but also to the nation, which crumbled not long after into two divisive kingdoms of magic and of science respectively. He was considered a villain by many, but performed a number of great feats with magic that might have been more powerful than his mother's but was never properly tested.