Here you have some important events for Aragon during the 1419-1516 period. I will put assloads of them and suggested effects, I can't code, so I'll put it in plain. The text is also not meant for being it put in the game, yet, just for make you understand the events I can write it for the ones you're most interested in.
Have in mind that one of the most important struggles of the era were the one between the Trastamara dinasty that came from Castilla, which was an absolutist country, and found in Aragon a Parlamentarian Monarchy. Any idea on how to use effects to show the balance between parlamentarism/authoritarism? (something sadly left out of EU2

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1419 The Courts oppose the Castillian king
Trigger: Date (during 1419)
During the 1419-1420 period there was an internal strife between the Courts and the King Alfons. The reason was not only the predomination of people of Castilla in important offices of the Government, but the complete acceptance of the Constitutions of Catalonia, which would greatly limit the power of the monarch.
A) Expel the Castillians from the Government (Stab -1, Desc +1)
B) Expel the Castillians and swear the Constitutions (Stab +1, Desc +2)
C) Try to rule independently of the Courts (Stab -3, Cent +2)
1420 Revolts in Sardinia
THIS IS AN EVENT FOR GENOA!!!
trigger: Aragon controls Sardinia
Aragon and Genoa were rival powers in the domination of trade in the western Mediterranean, and Corsica-Sardinia were they preferred grounds for the fight. Genoa instigated rebellions against the Aragonese presence in Sardinia in hope that a succesful revolt would put Sardinia under its domination.
A) Incite a general revolt in Sardinia (-250 ducats, revolt in Sardinia, rebels control the capital, revolt risk +3 for 5 years, relations with Aragon -100)
B) We can't spare many funds for that (-100 ducats, revolt in Sardina, revolt risk +1 for 2 years, relations with Aragon -50)
B) Don't seek troube with Aragon (no effect)
Also, any suggestion on how to make Sardinia a vassall of Genoa should the revolt succeed?
Discovery of Genovese conspiration
Trigger: Aragon regains control of Sardinia after it was controlled by Rebel Scum (can this be done?)
After the defeat of the Sardinian rebels, the King of Aragon used the collaboration of Genoa as an excuse to DoW Genoa and try to take off Corsica from them.
A) Dennounce the Genovese conspiration (temporary CB against Genoa, relations with Genoa -100)
B) Don't seek trouble with Genoa (no effect)
Ops, before proceeding. Is there an event for the inheritance of Naples by Aragon? Because I need that in order to proceed and I think I saw something along these lines in the text.csv file...