My favourite five symphonys are:
The BEST: Symphony in D, César Franck (1822-1890)
2- 9th Symphony, Ludwig van Beethoven (1770-1827)
3- 5th Symphony, Ludwig van Beethoven (1770-1827)
4- 4th Symphony, Albéric Magnard (1865-1914)
5- Symphony in E flat, Sylvio Lazzari (1857?-1944?)
P.S.: I don't know the «Symphony in G» (1840) from César Franck. I think it's also my best favourite!