F-Mattox, I think you are referring to the Andrea Doria in 1957.
The ship was listing so badly that only half of the boats could be launched - it almost became another titanic, but every available ship assisted the rescue. The only fatalities where people who died in the initial collision, everybody else got out.
There was a similar incident in 1914 - The Empress of Ireland suffered collision with another ship in the St. Lawrence river - it rolled over and sank in less than 15 minutes. In terms of loss of life - it was worse than the Titanic, but it is barely a historical footnote becase weeks after the accident - Europe erupted into WW1.