The stock-market crash has resulted in once-great pillars of stability crumbling, leaving behind a rag-tag group of mid- and small-cap stocks to fill the void left at the top of TheStreet.com Ratings' rankings of the best companies in which to invest, according to our quantitative model. Last year at this time, giants such as State Street ( STT), Raytheon ( RTN) and Petrobras ( PBR) were listed among the 30 top-rated stocks. All have now fallen to a "hold" rating. Our model is identifying medium-sized and small companies such as Village Super Market ( VLGEA) and ITT Educational Services ( ESI) as the best stocks. Shares of those companies may rise more than others when the stock market rebounds. The combined market value of the top 30 companies as of March 16 is less than that of Petrobras alone. In a list of names that may be unfamiliar to some investors, only one large cap remains: Gilead Sciences ( GILD) has a market cap that is $37 billion greater than the next biggest company on our most recent rankings. One of the smallest companies on the list is also one of the most highly rated. Village Super Market receives an overall grade of A from our model because of strong fundamentals and a conservative balance sheet. Less than 11% of the company's financing comes from debt. Over the past year, as the S&P 500 lost 38% of its value, Village Super Market gained 38%. Small companies' strength is partly due to the fact that few are highly leveraged.