The following list for you is arbitrary and incomplete:
Igor Stravinsky: Violin Concerto (youtube, Gil Shaham, violin) / Petrushka, full length ballet for large orchestra / Duo Concertant (youtube, Itshtak Perlman, vn; Bruno Canino, piano) / Concerto in D for String orchestra (youtube, ensemble named 'a far cry.') / Symphony of Psalms / Symphony in C / Apollo, for string orchestra.
Prokofiev: Five Piano Concertos / Two Violin Concertos / Symphonies / Seven Piano Sonatas / Scythian Suite, for orchestra / Alexander Nevsky, cantata for orchestra and chorus / Suggestion Diabolique, for piano / Toccata, for piano
Ravel: Miroirs, for piano / Concertos (2) for piano / Daphnis et Chloe, complete - ballet, for orchestra with additional wordless chorus. / Introduction and Allegro for Flute, Clarinet, Harp and Strings / trio for Piano, violin and cello / String Quartet.
Debussy: Nocturnes, for orchestra, No.3, 'Sirenes' includes wordless women's chorus / La Mer, a symphony / String Quartet / Sonata for flute, viola and harp / l'Apres midi d'un faun, for orchestra /
Danses Sacree et profane, for harp and strings / books of Etudes and Preludes for piano
Milhaud: Six petites Symphonies / Saudades de Brazil / La Creation du Monde / Wind Quintet
Samuel Barber: Piano Concerto / Violin Concerto / Cello Concerto / Capricorn Concerto / Knoxville summer of 1915, for Soprano and Orchestra / Excursions, for piano / piano sonata.
Lukas Foss: Song of Songs, for soprano and orchestra / Orpheus, for viola or cello and orchestra.
Hindemith: Mathis der Maler, suite for orchestra / Kammermusik No. 4, for violin and chamber orchestra
Alberto Ginastera, Dansas Argentinas, for piano
Luciano Berio: Sinfonia, for orchestra and amplified small choral ensemble, amplified piano / Visage, for soprano and prepared sounds on tape / Folk Songs, for soprano and small instrumental ensemble.
Olivier Messiaen: Vingt Regards sur l'enfant Jesus, for piano / Trois petites liturgies pour la presence divine, for orchestra, women's chorus, Ondes Martenot / Turangalila Symphony
John Adams: Shaker loops for string orchestra / Common tones in simple time, for orchestra / Harmonium, for chorus and large orchestra / Century rolls, for piano and orchestra.
Toru Takemitsu: Dorian Horizon, for string orchestra / Green, for orchestra
David Lang: Slow Music / The passing hours, for women's chorus and amplified instruments.
Manuel de Falla: Harpsichord Concerto / Nights in the Gardens of Spain, piano and orchestra
Francis Poulenc: Concerto for two pianos and orchestra / Gloria, for soprano, chorus and orchestra / Organ concerto, organ, strings and timpani / Concert Champetre, for harpsichord and orchestra /
Elliott Carter: Sonata for Flute, Oboe, Cello and Harpsichord / Cello Sonata / Piano Sonata / A Symphony of three orchestras / String Quartets / Double concerto for piano, harpsichord and two orchestras.
Witold Lutoslawski: Symphony No. 3 / Piano Concerto
Einudi Raatavaara: Sinfonia Arctica / Symphony No. 6,
Shostakovich: Symphonies / two piano concertos / srring quartets.
Bartok: Music for Stringed Instruments, percussion and Celesta / Three piano concertos / Concerto for orchestra / Sonata for two pianos and percussion / Cantata Profana, for chorus and orchestra / The Miraculous Mandarin, a ballet score / Contrasts, for piano, violin and clarinet. / Six seriously good string quartets.
Christian Murail, contemporary french composer.
Einojuhani Rautavaara: Cantus Arcticus, for orchestra and taped bird song ("concerto for birds") / Symphony No. 7 'Angel of Light.'
You can catch the drift: Find'em on youtube, the posting member's site usually has similar, often very knowing, and you can expand from there.
Best regards.
P.s. after checking out Eric's suggested clips, I cannot imagine that he or you are looking for anything remotely new-ish: the 'stuff' of those clips is like a pathetic attempt to write / re-write more Mendelssohn, Chopin and, even worse, John Williams and Danny Elfman etc. I can't imagine why those composers eric posted even bothered.....
When people with little listening experience and the most limited of taste and imagination start pronouncing music of their taste as 'great music,;.. then everyone is a critic, sort of like those clips themselves claim, "everyone is a fabulous composer." What a load of steaming pony loaf codswollop the music in those clips is, including the given opinion of it- IMHO.