1. VTSAX: The Vanguard Total Stock Market Index Fund
This is one of the best index funds out there. It has the history, the price point, the recommendations from so many people, and it has a collection of over 3500 different companies that make up this fund.
2. VFIAX: The Vanguard S&P 500 Fund
This is one of the original index funds. Initially, this was the admiral shares of the fund, but VFINX has been discontinued for new investors