Answer:
There is no concrete answer to this question, it is up for your interpretation.
In my opinion both are important and they cannot be compared fairly. Teachers are important because they pass on generations of knowledge and help guide others to success. Without teachers there would be no doctors. However, without doctors there would be dramatic decrease in teachers! People would die. We wouldn't have modern medicine in order to live long and healthy lives.
I hope this response gives you some ideas and helps you develop your own opinion for this assignment. Feel free to ask any questions if you need further support.