There is even someone bigger... his name is Shahrukh Khan... he's India's biggest bollywood star and regardless of how much you crap on bollywood, this man's story of getting from:
a degree in mass communications from one of India's best colleges St Xaviers, both his parents died when he was younger and then his sister (who used to be one of the earners for the family and was an extremely bright intelligent hard worker) became extremely mentally disturbed, almost a vegetative shock state after the death of the parents...
So Shahrukh Khan, on his own financing his way with multiple jobs, and tad tiny bit roles (like 1 or 2 ads) managed to get his college degree, pay for his own tuition, TAKE CARE OF HIS SISTER AND at the same time pursued the love of his life Gauri whom he met during his college years. Gauri's parents wouldn't allow for Shahrukh Khan to marry Gauri and they were shifted to Mumbai... Khan after completing his degree wanted to pursue acting and also chased down Gauri all the way to Mumbai to ask her to marry him
Gauri agreed, Khan did his all best to try to get into the industry, getting rejected left right and center for his "untraditional not so good looking classical bollywood star looks/physique" FINALLY managed to score a major TV gig about the Indian Circus followed by another about the Indian Army, which became his launching pad into films...
The man had literally nothing except drive, drive, charisma, and a level of intelligence not witnessed before in Indian cinema in general... using his extremely sharp mind, he found a way balance his budget, take care of his sister, win the love of his life, start a family, and become India's current biggest star.
THAT is one of the ultimate rags to riches story... much more so than any other celebrity listed on this topic