palliator

/ˈpæliˌeɪtər/
noun
  1. A person who tries to make a problem or bad situation seem less serious without fixing it.
    • She was known as a palliator who smoothed over conflicts without resolving them.
    • The manager acted as a palliator, downplaying the team's failures.
    • The politician was a palliator, offering excuses instead of solutions.