...Where he is overshadowed by other Special Attackers such as Alakazam and Starmie?
He derserves that OU spot though
But the thing it has over Alakazam is Destiny Bond. Sash + Bond lead Gengar can do amazing against unsuspecting victims. I do like Alakazam in OU more, but to compare them isn't really fair as Gengar has it's own niche's that don't involve being an all out attacker.
Let's face it though, a lot of people turn to Alakazam and Starmie when they need Special Attack sweepers that can kill other sweepers. Mostly because they're much faster