After Henry VI’s death in 1471, Henry IV’s legitimate line was extinct but his sister’s senior descendant was her grandson, Afonso V, King of Portugal (1432 r.1438-81). He was, therefore, the principal Lancastrian claimant to the English throne, although Edward IV had become Duke of Lancaster by then as a result of Henry IV merging that title with the Crown.
After his death, the senior claimant was Afonso’s son Joao II (1455 r.1481-95). In 1485, following Joao in line, were:
2) His son Afonso.
3) His sister Joanna.
4) His cousin Manoel (later I), Duke of Beja.
5) Phillip (“the Handsome”, later I) of Castile.
6) Margaret of Savoy, his sister.
7) Ralph, 3rd Earl of Westmorland.
8) Edmund, 1st Earl of Kent.
9) His son George Grey.
10) His grandson Richard Grey.
11) Isabella, Queen of Castile.
12) Her son Juan.
13) Her daughter Isabella.
14) Her daughter Juana (“La Loca”).
These people all precede any Beaufort, even when the “excepta dignitate regalis” clause of their legitimisation were ignored. So, if you were a diehard legitimist Lancastrian, let us introduce you to your missing “Kings of England”.