Dude, this is sooo jazzy.
I don't normally play jazz, but I see it more fitting into an ending or an intro. It would most likely be a 4 or 2 chord:
I see it as a 4 in this jazz progression:
eg,
in B/ Cb
4 E/G-B-D#
7 A#/G#-C#-F#
3 D#-(G#)/F#-A#-D#
6 G#/F#-A#-B
2 C#/E-G#-B
5 F#/D#-F#-A-C#
1 B/F#-A#-C#-D#
4 E/ D#-G#-C#
[Repeat]