Not exactly avant gaurd, since its sooo melodic. But the way he incorporates all these different musical elements is absolutely genius. I think there is something, at this point, avant guard about playing Jazz music that is designed to be as well crafted as a pop album with a million dollar plus budget. This guy is introducing prepared piano, electronic drum programming, poly rhythms, and even novel distribution channels. He released his last album as an app, so musicians can hone in on each instrumental part, see the musical notation, and play along.

https://www.youtube.com/watch?v=fuGc7YvQzeM&t=2453s