Ohh, I like the Slag's leader idea too. It makes sense to give a TH to either a leader (Lynette, Lockley, Marcus, Morpheus, Maxon, Aradesh, Tandy, Master, Lieu) or someone of importance (Vree, followers of the apoc leader, guy in hub who gives "find source of missing caravans" mission, Harold). Like Glovz said, the goggles make sense given their sensitivity to light, and the look of the Rake TH just feels like a good fit. Even Rake's slight tan could be explained. Some people with a very fair complexion tan immediately following a sun burn. Given that some of the slags use the glowing ones models, we can assume they're white as snow. It isn't unreasonable to assume that the slag's leader has taken it upon himself to venture into the fields while the sun remains in the sky.
Beyond that, the style that the character conveys through their dialogue is important in forming how a player thinks of them. I believe Vic is not suited to Rake's head at all, and making it so would be akin to shoving a square peg in a round hole. You can do it, but it'll look like shit.