OK, the candidate that best fits that description is Barack Obama in my Opinion. He has a near Universal health care plan that allows people to opt out if they have their own health care, which cuts the overall cost of the plan. "The economist", an international weekly political magazine, the focuses on economics, judged his economic stimulus plan to be the best. He formerly worked as a community organizer, making $12,000 a year (just over minimum wage at the time) working with a group of churches in the Chicago area to bring about social change before he decided to go to law school to fight for social change via a different route.
Obama has said that he is willing to leave all options on the table when dealing with other countries, and I believe that all of the candidates would be quick to fight on foreign soil if America comes under attack.
To find the candidate that is most like yourself, follow the link below. It will have issues, and will be difficult to follow criteria such as doing manual labor, or had to live paycheck to paycheck, but should help you decide on the other issues you find important.