Any music like this?

Any bands that sound similar to diablo swing orchestra? Like good swing or obscure/unconventional metal? Other suggestions are welcome, I'm pretty open unless it sounds manufactured (mainstream hip-hop, pop/dance music, rap).

Reply probably nothing quite like them but try these for size : Unexpect - Akphaezya - Epica - Stream of Passion - Therion - Ram-Zet - Haggard - Arcturus - Carnival in Coal & Sleepytime Gorilla Museum.
None of these are quite like Diablo S. O. but I am sure you will find some avant-garde gems that you will enjoy.

Try Jacula. You can't get more darker than that, I guess.