Ricky, with Tom coming in as a close second. Ricky is a man on a mission, he knows exactly what he wants and strives to achieve it. He can talk his way out of virtually any situation.
Tom can sometimes fold under pressure, can give off the wrong impression (e.g. while speaking to the artist, he went on a bit).
Jade has the determination but sometimes makes shockingly bad choices.
Nick might be clever but he's not good at getting his point across. As Karen pointed out yesterday, he didn't try hard enough!