What are the three most famous oratorios?

There are lots of answers to that question. My favorite three works are:

"The Messiah" by Handel, "The Four Seasons" by Vivaldi and J. S. Bach's "Brandenburg Concertos". Some very familiar songs are: "Kanon in D Major" by Pachelbel, "Jesu Joy Of Man's Desiring" by J. S. Bach, and "Hallelujah Chorus" from Handel's Messiah.