My Leghorn is the lead hen. She's gotten along fairly well with the others. Same for the Welsummer.
Dominiques would be a good breed as well. Not the friendliest, but mine are the friendliest birds on earth, especially if food is involved. I have a group of six (Leghorn, Welsummer, 2 Cream...
We have a bunch of mixed breeds. Feathered feet get damaged feathers which get picked at by other chooks. Plenty of bloodshed there.
Speckled Sussex, Cream Legbars, Welsummer, Leghorn.
You might want a rooster as well if it's a small group. Make sure you cuddle the thing a lot while it's a chick.