Well as much as some of the forumites may dislike this suggestion

you could consider Chopin's famous Fantaisie-Impromptu. It's somewhat a step down from the Polonaise-Fantaisie, but seems like a step up (or about the same level) as the other pieces you mentioned, so it's probably close to what you've played. It might not be difficult enough to be considered a virtuoso piece but it still has its share of technical challenges, but not inaccessible.
The reason why some of the forumites may dislike this suggestion is that within pianist circles it tends to be overplayed, so you'll get some eyerolls from judges if you use Fantaisie-Impromptu in a piano competition (they hear it all the time). Additionally, being overplayed also means that it's quite often not played well.
However, I think one of the reasons why a piece is popular is
precisely because it sounds good for its difficulty; for a given amount of technical ability, the piece is more pleasing to most players than many other pieces. So you get more bang for your buck, so to speak. And outside of pianist circles, it will almost certainly be "new" since relatively few people are exposed to classical music these days, so you won't have to worry about eyerolls. This is one of the few piano pieces that I still play from my high school days, even though I've been playing it for (literally) half my life now, and I keep finding that there's stuff that I could work on to improve this piece even though I've learned it a long time ago; it never feels boring.
There's a number of good renditions of this piece on Youtube, I'll just post Yundi Li's recording:
and Rubinstein's more rubato recording: