I have an icon set that I have used for several years, it is dark themed faenza called F-Variants. Problem is that faenza icon theme needs to be also downloaded to get the full effect. The icon works very well with a dark theme, and VSIDO to me has a certain mystique and look. Also found these years ago and direct downloaded, I have the complete set of 18 different sets, although to me there is only 2 that are distinctly different. The complete 18 set is 22mb, only one set is needed and about 1.2mb. The URL is where I have recently found a link, but yet not downloaded because I have them. I would be happy to upload these sets to MEGA for a closer look.
http://www.unixmen.com/f-dark-faenza-icons-set/These icons work the best on a dark background, look crappy on a lighter background.
Z