My brother died two months ago and loved food, I mean really loved it, and so many different kinds. We celebrated this by preparing the ones he liked and it was a wonderful memorial. Not that you should do that, but I wanted to share.
I would make a pot of chile, a lazagna, both "travel" well.
Baked rosemary chicken is yummers.
Chicken in a mushroom sauce, really campbells soup makes a wonderful Sau de champinion, called "cream of mushroom soup" that has tons of chicken recipes.
You want it to be nice food that is simple and easy and delicious for those in your life that need comfort.
One of those big chocolate cakes from Costco or the tray of oversized muffins will provide for some bereavement grazing.
You are kind. All the answers here are quite good, the serious ones, so have some fun with it and wish them your best.