I just heard about Elisabeth Sladen.
As a strictly New Who casual fan, I barely have the past with Sarah Jane that others might have had, but I loved her for the little I saw of her. She was everything I imagine a former companion of the Doctor would be. Strong, independent, and heroic… compassionate and loyal… loving.
I wish I’d known her better, and by her I mean both the character and the actress who brought brought her to life.