Perkin Warbeck and Lambert Simnel are two of the best–known claimants, but there were others. In the words of a blog named Tudor History, "The very fact that Henry Tudor became King of England at all is somewhat of a miracle." (They mean, of course, something of a miracle.)
History Learning Site notes that "Henry VII had to face other Yorkists threats than just the Lambert Simnel and Perkin Warbeck rebellions ... In 1499, the Earl of Warwick was executed – the last of the major York claimants to the throne. After his execution, the next claimant was Edmund de la Pole, Earl of Suffolk. He was the brother of the Earl of Lincoln who had been killed in the attempted Simnel Rebellion."
The Earl of Warwick referred to was the 17th Earl. His father, the 16th Earl, was the one known as Warwick the Kingmaker. Following the execution of the 17th Earl the title became extinct. (It has since been recreated three times; the current Earl of Warwick is the 9th Earl of the fourth creation.)
Edmund de la Pole was the grandson of Richard Plantagenet, 3rd Duke of York, whom we met while discussing the Plantagenet monarchs. He was also (through his mother) the great-great grandson of Geoffrey Chaucer. His elder brother John was the nominated heir of Richard III, but he was killed while supporting the rebellion of Lambert Simnel. This left Edmund as the leading Yorkist claimant to the throne. He and his brother Richard left England in 1501 without the leave of the King, and this was seen as an act of rebellion. Imprisoned in France, he was handed over to Henry VII in 1505 or 1506 and eventually executed by Henry VIII in 1513.
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