Sometimes Catholic clergy in newly christianized European countries supported Jewish immigration as tool to strenghten Christian faith among recently baptised pagans, making Biblical stories more credible for them: "You see? These guys from the Bible are real! So is the rest of the book"
Well, there were male Angevins around, but Louis sidelined them in favour of his daughters, with ended badly for whole Capetian House of Anjou. Had Louis recognize Charles of Durazzo as heir, things would go better for dynasty.
Bigger problem than patriots would be Russia, with whom Wettins had to deal, otherwise some patriots would be bribed and if civil war starts in PLC there would be no military force able to withstand improved Saxon army.
Hungarian Angevins: under Charles Robert and his son Louis the Great Hungary was stronger than ever, but Louis died without sons, rights of his daughters were questioned, his realm was split and Hungary descended into Civil War.
As you wish:
Charles IV (1421-1468) King of Navarre 1441, King of Aragon 1458 m. a) Agnes of Cleves (1422-1448) b) Catherine of Portugal (1436-1463)
1a) Blanche (1440-1500) m. Afonso V (1432-1481) King of Portugal
1) Edward (1460-1464)
2) Charles (1462)
2a) Eleanor (1442-1447)
3a) Agnes...
Charles IV (1421-1468) King of Navarre 1441, King of Aragon 1458 [1] m. a) Agnes of Cleves (1422-1448) b) Catherine of Portugal (1436-1463)
1a) Blanche (1440-1500) m. Afonso V (1432-1481) King of Portugal
2a) Eleanor (1442-1447)
3a) Agnes (1443-1469) a nun
4a) Joanna (1446-1499) m. Alfonso...
Mary of Burgundy could marry Louis XI's younger brother Charles (they even received papal dispensation, but Charles died in 1472), who'd inherit French throne after Charles VIII if he outlives him
In the Crown-yes, in GDL magnates were far stronger and single magnate family (Radziwiłł, Pac, Sapieha) could dominate the Duchy to degree unimaginable for even strongest families of Polish part of PLC.
Well, at times Grand Duchy of Lithuania was dominated by single magnate family (Pac during Sobieski's reign, then Sapieha).
https://en.wikipedia.org/wiki/Lithuanian_Civil_War_(1697%E2%80%931702)
Bona does not fall from her horse in Niepołomice, her last child lives. Another take:
Albert II (1527-1583) Duke of Bari and Rossano, Grand Duke of Lithuania, King of Poland, m. Anna d'Este (1531-1607)
1) Anna (1550-1552)
2) Isabella (1551-1621) m. Francesco I (1541-1587) Grand Duke of...