One thing I'd like to do in Oblivion is to be able to sneak past enemies by disguising as one of them. For example, if an NPC asks me to retrieve their grandma's locket that a group of bandits stole, I could disguise myself as one of the bandits, walk through camp and (when no one is looking) grab/pickpocket the locket and get away with no one the wiser. I thought Ronakoa's mod was the answer, but I stumbled upon an http://oblivion.nexusmods.com/mods/24872 Seeing as http://tesnexus.com/downloads/file.php?id=23526 improves upon the formula (and I didn't know it existed until today), I figure that maybe I might be missing other gems like that.

Are there any other gems that add to or complement the above 2 mods?

I'm not sure if this is what you are looking for but from the sound of it you might be interested: http://www.oblivion.nexusmods.com/mods/42619

This type of mod is exactly what I'm looking for Shinobi, so thanks!

Based on the videos, it's only for guard armor so it's similar to "One of the Gang." This one is fairly new, so maybe he'll expand on other armor types soon. If he does, I'll be looking forward to how he does it.

Glad I could help.