Only 1? C++. Performance and good compilers for every platform. Raii makes handle management easier than the nested try/catch mess found in java and similar GC Lang's.
Ruby is about to die permanently. A language that copied emacs-lisp but with syntax? Lol that gives it features to impress the ignoramus majority but real Haskell or Lisp programmers know better.
I am outraged by your post. Look at start ups as a whole and it is full of white people. By using the "small company" excuse you are allowing an entire segment of the economy to bypass diversity!
Start ups are in desperate need of diversity training.
I don't think the arguments from either side are too simple. People who recieve free college are in favor. People who must pay the bill are not in favor.
Tech is brimming with diversity so he can't make a good statistical argument without lumping whites and Asians together as one race. His goal isn't racial diversity, it is the advancement of his race only. Even at the expense of other minorities like Asians.
Are tech companies turning people away due to their race? Or are there simply not enough black programmers? If the latter, then diversity for the sake of it is going to be... strange.
Is you can have 2 langs then pick lisp.