What are safe or average component temperatures for my MacBook?
There are two sentences in this question that of concern:


  My MacBook has been overheating for over a year now.


and


  Today I have installed Mac Fan Control, and realize that the fan still
  works on my computer, hopefully I can prevent anymore burning (smell)
  from the laptop.


If you are aware that your computer (this is not limited to Apple products) is overheating, it's time to take it in for service.  All modern computers have thermal limits which will shut down the machine if it becomes too hot.  If this is happening on a regular basis, there is something wrong and it needs to be addressed

Further, if you actually smell something burning from your computer this is a physical problem that simply cannot be fixed with an app.  This is like running your car without out oil and then expecting to put some high grade gasoline because it has wear additives that prolong the life of your engine in the hopes that it solves the problem.  

To put this another way, you can't "un-toast" toast and get bread.

Once you smell the telltale scent of burnt electronics, you're past the point of no return - it's time to take it in for service.