Who is your audience here? Is this like, something to play to young people to convey profound and intense emotion? Or something to show you're brilliant and technically accomplished? What's your preferred type of music? I think this matters in terms of what people would recommend. Personally I find traditionally 'dramatic' pomp-and-circumstance music, piano or otherwise, totally un-dramatic - annoying, in fact.
Here are my suggestions:
Chopin Nocturne No. 3. in G Minor, Op. 15.
Lilac - Tigran Hamasayan, you can get the score online for a few quid. Sounds much harder than it is although you do need good speed and dexterity, in my opinion.
Ravel - Pavane pour une Infante Defunte - technically not hard at all, but the 7th chords make it impactful and I reckon maybe grade 6 or grade 7 or bave, to play well?
'Teares' by Huw Warren - no score, I checked, so you'll have to do it from ear but it's lovely. Lots of runs, which are a bit too hard for me but I don't know what standard you are.
It's a shame to write off anything by people other than dead white men.. there's so much variety out there.
Full disclosure, I've never had a piano lesson in my life and my technical skills are absolutely awful - my friends who have had lessons tell me that I need remedial lessons pronto. I won't be playing Rach 3 any time soon. But oh, I do love my piano. ......