What essential leadership traits should every leader possess?

According to the 7 Essential Leadership Traits for 2016, by Don Trone, Mary Lou Wattman and Steve Branham, the traits are as follows:

 

  1. Courage
  2. Purpose
  3. Passion
  4. Alignment
  5. Adaptability
  6. Accountability
  7. Resilience

As 2016 begins, leaders have already seen many changes within their organizations and industry and need to apply each one of these traits in order to deal with their challenges. Please share your challenges that you have faced and what traits or solutions you used to overcome those challenges. The best kind of learning are actual challenges and solutions that your peers faced, just like the articles uses the Apollo 13 CO2 scrubber challenge.