Do you want to know who lived the most amount of years / had the longest life? Or do you want to know who lived to the latest year?
Daniel Webster lived from January, 1782 to October, 1852 (70 years).
Henry Clay lived from April, 1777 to June, 1852 (75 years).
John C. Calhoun lived from March, 1782 to March, 1850 (68 years)
If you want to know who lived to the latest year, it's a tie between Daniel Webster and Henry Clay, who both lived until 1852.
If you want to know who had the longest life, it's Henry Clay, who lived 75 years.