Texture Optimization Project by torcher problems with for example Codsworth and bobbypins looking like a matte dark grey, in the bug section fix, you can also use this if you're having problems with it in general without TOP, but I use it because of TOP!
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When I used Texture Optimization Project by torcher I had problems with Codsworth and bobbypins looking like a matte dark grey, in the bug section I found a solution since there were missing cubemaps, so I extracted the vanilla cubemaps from texture,ba2 files 1, 2, 3, and 6 and put them in loose files, tell me how it worked for you !!!
You can use this mod if you don't have TOP and are just having the dark grey bug, it should work no problem.