Neville
Poor Neville never had any luck, not even at birth. His parents were Crusifed by Bellatrix Lestrange, he got thrown out of a window by his uncle and have the most terrible luck with memory. During his years at hogwarts poor young Neville fell of his broom, got lifted by his ears by cornish pixies and had to face Professor snape every day, but as the years went on, the bravery was clearly growing in Neville. By cutting of Nagini's head Neville saved Harry's life but also everyone elses too. Neville has a toad named Trevor who he keeps losing every five minutes but loves dearly.