Who are the seven main charaxters of "How The Grinch Stole Christmas"?

My family, of seven, is doing a "How The Grinch Stole Christmas" Christmas card theme. I am doing a photoshop. I am Cindy Lou Who, my dad is the Grinch, one of my brothers is the tree, another is the dog, I still need my mom, and two brothers still need to be done, who can they be?