15mm slave traders -- OG15 SYW Ottomans?

Just posted on TMP, but I know there is a lot of XVIII century expertise here too, so I will repeat the question.

I am looking for good/passable stand-ins for African slave traders in the late 1800s. Think Gordon.

One option would be a mix collection of Colonial Egyptians, Sudanese, and Beduins, maybe with an occasion Crimean War Turks.

Another option is to look at the SYW Ottomans in the Old Glory 15 range, about which, unfortunately, I do not know anything. They are supposed to cover the 1700-1820, so I should be able to make some quick conversions without pushing the envelope too much. But what which bags should I consider? Bashi Bazouks? Nissam? Janissaries? Sekans? I am not familiar with any of these types, and no pictures are available at OG15. Anyone familiar with the ranges could provide some quick summary and/or description? Recommendations?

Thanks in advance, guys!