[IIL] Invasion (Bleach OST) [WEWIL?]

So, to give more context, I'm looking to use a theme for a specific purpose: To introduce a very sinister character in a very sinister manner.

Invasion does this, almost to the dotted 'i's and crossed ts, except for one big drawback: it has a guitar in it.

I'm looking for something that conveys the sinister feeling that Invasion does, except without the guitar being a part of it at all. Think kinda, the way that Dark Souls does its music. So no electronic either, unfortunately.

If someone can find me something like this, I'll love you forever. I've been searching for weeks for something good with no luck.