Duryodhan
Duryodhan was the son of Dhritrashtra and Gandhari .Eventhough he was a great warrior his lust for power and land led to his ruin.He was easily influenced and so was an easy bait for Shakuni’s clever tactics.
Inspite of all these flaws he still got a chance to go to heaven as he fought the battle the ethical way.He even has a temple devoted to him where he is revered till now.