My first mod on the Nexus :
Now with 15 characters from the Metal Gear series. Tried to make them as accurate as I possibly could lol. Please let me know if there's any other character you want, or changes to any of the current ones. 
Characters in this mod :
Venom Snake, Solid Snake, Liquid Snake, Naked Snake ( Big Boss), George Sears ( Solidus Snake ), Raiden, Otacon, Kaz Miller, Ocelot, Quiet, Eva, Volgin, The Boss, MGS PO Roy Campbell, Frank Jaeger ( Gray Fox ).

NEW V2 ! Added Col.Volgin, Otacon, The Boss, Quiet, Eva & MGS Portable Ops' Roy Campbell. Also made some minor changes to character bios & an appearance tweak for Liquid.

NOTE : use the Right Side Eyepatch mod from Steam Workshops for the authentic BB/Venom Snake experience. Just checked, works with all other mods.

Incompatibilities : none so far.

Installation : unzip the file to desktop, then put it in the Documents/My Games/XCOM2/XComGame/CharacterPool/Importable folder

I might try adding Skull Face, Gene, Meryl & Quiet later, depending on the demand for it.