He looked very similar to his maternal grandfather, Edward 4, who was about 6 foot 3 or 5, depending on what you read. He also went to seed quickly, indulging in booze and women and overeating and died early, leaving his brother to clean up his mess.
Richard, Duke of Gloucester certainly cleaned up Edward IV’s mess by declaring his children bastards, naming himself King Richard III, and murdering his two nephews, Richard, Duke of York, and Edward V.
The alleged real King was a man who was living in Australia...Mike Hastings.
Here's a link to an article reporting his death, as well as info regarding the claims: