Pieces like, and these are off the top of my head:
Both Holst suites
Variations on a Korean Folk Song
Folk Song Suite (Vaughn Williams)
Music for Prague, 1968
Russian Christmas Music
La Fiesta Mexicana
Symphony No. 1 (Hindemith)
Armenian Dances (Reed)...both parts 1 & 2 (even though part 1 gets more play)
IIRC the pieces above are mostly Grade 5, but I think Korean Folk Song, and the first Holst suite are Grade 4.
Alfred Reed did some really good orchestrations of pieces by J.S. Bach that were until recently on the Grade 3 PML, and have been taken off. If Thou Be Near, Jesu Joy of Man's Desiring, and Come Sweet Death come to mind.
I know that I'm forgetting some titles, but this should at least get you started.