Edward Stafford, Duke of Buckingham. Was nephew to Elizabeth Woodville, the wife of King Edward IV therefore having the Plantagenet bloodline. He was found guilty of treason and beheaded. He plotted to kill Henry VIII.
Edward IV - King from 1461 - 1470 and 1471 - Fought against his cousin, Henry VI, in the War of the Roses. He again had to fight his cousin when Margaret of Anjou invaded in but beat them again a year later.