The list is kinda endless - its sometimes a lottery as to whether the piece you play really hits with the kids in the band or not - but here's a few random suggestions :-
Arnold 4 English Dances (set 1)
Berlioz Hungarian March from the Damnation of Faust
Brahms Academic Festival Overture
Liszt Les Preludes
Shostakovitch Symph No 1 or No 9
or better still
Shostakovitch Suite from the Gadfly - you don't have to do the whole lot - you can mix and match the movements
Sibelius Finlandia
Smetana Ma Vlast
Tchaikowsky Capriccio Italian or March Slave
Vaughan Williams London Symphony - its got Trumpet and Cornet parts - make sure the Cornet players use short model cornets
and.............
If you have a good string section but want to get revenge on the Trombones..........
Mendelessohn Midsummer Nights Dream - a very high Tuba part that if you get it sorted is wonderful
Have fun
Andrew M