#Pyth - 16 bytes

Uses quotes for the shade since N is preinitialized to that.

    *N4VQ+d`();"/__\

[Try it online here][1].

    * 4            String repetition 4x, implicit print
     N             Preinitialized to Quote
    VQ             For N in range(Q)
     +             String concat
      d            Space
       `()         Repr of empty tuple
    ;              Close for loop
    "/__\          Implicitly print string, implicit close quote

Sample for 5:

    """"
     ()
     ()
     ()
     ()
     ()
    /__\


  [1]: http://pyth.herokuapp.com/?code=*N4VQ%2Bd%60()%3B%22%2F__%5C&input=5&debug=0