1.Sgambati
2.d'Indy
3.Berwald
4.Magnard
5.Vaughan Williams
6.Prokofiev
7.Beethoven
8.Sciostakovich
9.Mahler
A big thumbs-up to Berwald 3. What a great and original piece. I first learned it as a classical music aficionado in my teens in the Seventies, when I owned the old Nonesuch LP of Berwald 1 and 3 conducted by Hans Schmidt-Isserstedt (and in fact still do own it, but it's in storage because I'm abroad). It amazes me that the Berwald symphonies have not made greater inroads into the "standard repertory," given that they deserve live performance at the same frequency as the Schumann symphonies. But that's the biz for you - not very enterprising.
I like your list in general - I'm also a big fan of Prokofiev 6 (really all of Prokofiev's symphonies).