Argentina:
Juan Perón: Charismatic, Organised
UU: Granaderos a Caballo, replaces Cavalry, +25% city defence
UB???
Armenia:
Tigranes the Great: Aggressive, Imperialistic
UU: Ayrudzi, replaces Horse Archer, receives defensive bonuses
UB:???
Ashanti:
Opoku Ware I: Aggressive, Protective
UU:Twafo, replaces Musketman, starts with Guerilla 1, 80 Hammers
UB: Drum station, replaces Observatory, -10% city maintenance, + 10% espionage
Benin:
Oba Ewuare: Creative, Financial
UU: Yoruba Warrior, replaces a mounted unit...
UB: ???
Brazil:
Pedro II: Expansive, Creative
UU:???
UB: Sambodromo, replaces Broadcast Tower, +2 culture, Football stadium?
Bulgaria:
Boris I: Expansive, Aggressive
UU: Bulgarian Horseman, replaces Horse Archer, strength 7
UB:???
Burma:
Anawrahta: Spiritual, Organised (Aung San Suu Kyi would make a great leader as well, but would have to be part of a "what-if...?" mod I think.
UU: Castle Elephant, replaces War Elephant, +25% vs Melee units, -25% vs Archer units
UB: Pagoda, replaces Theatre, + 4 culture, +1 Happy (I guess change the Chinese UB name, or this one)
Dacia:
Burebista: Aggressive, Spiritual
UU: Comati, replaces Swordsman, +1 strength, +1 first strike
UB: Murus dacicus, replaces Wall, -66% damage from Bombard (except Gunpowder Units)
Kanem-Bornu:
Dunama Dabbalemi: Spiritual, Imperialistic (Kanem)
Idris Alooma: Spiritual, Financial (Bornu)
UU: Some kind of mounted replacement...???
UB:???
Kongo:
Afonso I/Nzinga Mvemba: Spiritual, Organised
UU:???
UB:???
Aztec:
Nezahualcoyotl: Cultural, Philosophical
Ethiopia:
Haile Selassie: Protective, Spiritual
Roman:
Hadrian: Charismatic, Industrious
Viking: Cnut: Financial, Aggressive or Imperialistic