I have posted similar suggestions on other threads, based on my own experience. Although I don't own the syllabus, here are some recommendations:
Shostakovich - any prelude and fugue! Range from relatively easy and diatonic (the first one, in C major) to very difficult and essentially atonal.
Bartok - Romanian dances, Op 8a. You only need one (check the syllabus). Fun, and not too long or difficult.
Barber - Nocturne, and maybe the ballade (I forget whether it's allowed)
Hetu - check out some of his stuff - Impromptu, variations, ... he's not really my thing but he's a big Canadian composer.
Champlagne - Quadrilhia Brasiliera (Sp?) - don't know the piece well, but I've heard good things about it.
Oscar Morawetz (sp?)- Scherzo.
Prokofiev - third sonata is the only one listed in the syllabus.
(I forget if Medtner is List D or E in the conservatory system, but some of his pieces are listed.)
For my exam, I played Ginastera's Suite de Danzas Criollas. Awesome piece, in five movements plus a coda (10-11 mins). Also a "crowd" piece - very accessible to audiences

. Not technically a big problem, but give yourself some time to learn and memorize (as with any List E). The movements are:
I) - barcarolle-like, lapping accompaniment, with a lazy melody.
II) - the beginning has octave note-clusters in the RH! Some fast skips, but comes easily with practice.
III) - in 11/8 time, with an accompaniment of three-eighth-note figures matched against melody notes every two eighth-notes. Lyrical. Ingenious. There is a hidden canon in the middle section - don't miss it.
IV) - plaintive, questioning slow movement, with ingenious use of dissonances.
V) - a fast scherzando.
coda - in octaves and repeated chords, but not too difficult due to Ginastera's breaking up the octaves with notes for second and third fingers. The ending is insane.
Don't forget the "popular substitution" option, or whatever it's called.
have fun!