This list, although there are some missing, is HUGE. I am awe-struck. EU2 is going to be a great game. I hope all those nifty South Asian countries can stand the European juggernaut...
Since I suppose that the Crown of Aragon will be there with all his might (and political struggles), some catalan kings and generals for your list:
1412-1416: Fernando de Antequera. Very brief reign, dominated mainly with the struggle against the other contender to the Aragon crown. Jaume d'Urgell.
1416-1458: Alfons IV. Economic decline, political struggle with the parliament.
1458-1479: Joan II (Also King of Navarra). Very impopular king. A long civil war (1460-1471) happened during his realm, due to successory disputes (he married twice) and the hopes of Catalan rulers to get rid of the Castillian kings.
1479-1516: Fernando el Católico. He managed to content the catalan nobility, but the people was still unhappy. Good military leader, he often leaded the Castilla-Aragon armies in the war against Granada.
At the death of Fernando, Charles V inherited both Castilla and Aragon and Spain, so no more Aragonese kings.
All along the reign of the castillian kings, there were a lot of political struggle between the monarchy and the parliament (yup, we had a parliament far before England, let me brag a little
), because the castillian kings were used to absolute power. This resulted in a weakening of the administration of the kingdom and some uprisings. The power of Barcelona as one of the prime centers of trade in the Mediterranean declined.
Generals: I've to dig more, I have some names, but not death dates yet. But you can use King Fernando el Católico: he commanded armies, and conducted several campaigns for great success.
Some important political events, since you are going to implement that fantastic improved event engine:
1412: Casp Compromise: the last king of the Barcelona dinasty dies heirless and the inheritance is resolved with a voting, giving the crown to a castillian noble shifting the center of power from Catalonia to Aragon. Catalan nobility (who voted against him) wasn't very happy with this, so there was a civil war until 1413.The castillian king also gives his support to the Antipope Benitius.
1415: The king retires his support to the Antipope. He dies briefly after.
1460-1471: Succession war. Joan II marries again and unherits his first son, Carles, ho fights against him with the support of Catalan nobles, giving him the crown. Carles dies soon, but the fight continues as catalan nobles and the parliament want to see their lost privileges restored, and elect 3 different kings in 6 years.
1474: Marriage between Isabel and Fernando. Note that the marriage didn't actually merge the countries. It meant only an alliance. The merging didn't occur until Charles V inherited Castilla and Aragon from them.
I will not go far from here, but I can if you want. I will note only important revolts, for if you want to hardcode this kind of events, too.
1637: Catalonia refuses to participate in the 30-year War.
1640-1652: Catalonia revolts because of the abuses commited by Spanish troops stationed there amidst the 30-years war.
1700-1714: The Inheritance War. Catalonia supported the Habsburg contender, which promised the Catalan nobles to restitute them the lost privileges. The rest of Iberic Spain supported the Bourbon candidate.
1719: Small revolt against the Borboun dinasty exploiting the miseries of the Spanish war against England.
1794-1802: A string of border wars makes Catalonia support the French revolutionaries (they promised to invade Catalonia and liberate it). When Napoleon comes to power and allies with Spain, the war ends.
1808-1814: During the napoleonic wars, Catalonia is briefly segregated from Spain in 1809.
That's all. It would be great to put as many detailed events as possible in the countries we can play, it would greatly add to the flavor of the game.
Thanks for the great job.