Here's one okay outfit:
Hair: Unkempt (any dark colour)
Facial Hair: Poet
Coat: Assasins Coat (dyed moonless midnight black)
Upper body: Noble gents Shirt
Gloves: Monk gloves (dyed black)
Legs: Noble gent (dyed black)
Shoes: Monk boots (dyed Black)
Mask: Sunglasses (doesn't remember the name)
It's not the coolest outfit but it looks okay (at least I think so

)
Looks best with light weapon