This is fantastic! I love the big band sound you have here, and all the layers play on each other in a very necrodancer style! The rhythm is strong, the brass is fun and the keyboard fills in all the right gaps for me without making it sound busy.
I think this is the best one I’ve heard so far, you’ve managed to take it in your own creative direction in terms of sound but it didn’t feel like it would be out of place in the OST at all!