A couple of Sombra skins I worked on while at blizzard.
Base Sombra was by Hong Chan Lim
unfortunately I do not remember who did each of these concepts, but as with everything at blizzard, its always a team effort.
Talon Sombra Skin, final textures and mesh.
Talon Sombra Skin from the menu when it launched
Diver Sombra Skin screenshot from the skin menu when it launched